1) Caffeine is a nonpolar molecule. What is the most likely method b.pdf
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1) Caffeine is a nonpolar molecule. What is the most likely method by which it is absorbed into cells? a) Facilitated diffusion b) Osmosis c) active transport d) diffusion e) exocytosis 2) Cystic fibrosis is a disease caused by defective chloride ion transport into the lungs that results in thick, dehydrated mucus build up that promotes bacterial infection and other pathologies. What is the most likely cause of the defect that causes this disease? a) defective phagocytosis b) defective exocytosis c) defective osmosis d) defective transmembrane protein 3) Bacteriorhodopsin is an example of a ___(indicate all that apply) a) light-driven pump b) proton pump c) passive transporter d) coupled transporter e) transmembrane protein 4) The high intracellular concentration of K+ in a resting cell is partly due to: a) The K+ leak channels in the membrane b) the membrane potential c) the Na+/K+ pump d) voltage-gated K+ channels e) K+ stored in the endoplasmic reticulum.
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BSC1005 Biology General Chapter 6 1 Chapter 6 Cel.docx
BSC1005 Biology General
Chapter 6
1
Chapter 6: Cell Energy, Transport and Enzymes
1) Many of the enzymes that control a deep-sea firefly squid's ability to produce light energy from chemical energy are located
A) in membranes.
B) in the nucleus.
C) within chloroplasts.
D) outside of cells.
E) within mitochondria.
2) The fluid mosaic model describes the plasma membrane as consisting of
A) a phospholipid bilayer with embedded carbohydrates.
B) two layers of phospholipids with protein sandwiched between them.
C) a protein bilayer with embedded phospholipids.
D) carbohydrates, proteins, and phospholipids that can drift in the membrane.
E) individual proteins and phospholipids that can drift in a phospholipid bilayer.
3) Membrane phospholipids
A) have hydrophobic heads that face the center of the membrane and are shielded from water.
B) have hydrophilic tails that face outward and are exposed to water.
C) often have "kinks" in their tails caused by the presence of a double bond between carbons.
D) remain fluid because they are tightly packed against one another.
E) form impermeable layers for cells.
4) The cholesterol associated with animal cell membranes
A) is attached to membrane proteins and extends into the watery environment surrounding the cell.
B) helps to stabilize the cell membrane at body temperature.
C) makes the cell membrane fluid at room temperature.
D) is an abnormality resulting from a diet high in cholesterol.
E) helps solidify the membranes when the room temperature is below freezing.
5) A major function of glycoproteins and glycolipids in the cell membrane is to
A) glue cells together to form tissues.
B) allow the cells of an embryo to sort themselves into tissues and organs.
C) attach the cell membrane to the cytoskeleton.
D) help the cell resist swelling.
E) help the cell retain its shape.
6) When physicians perform an organ transplant, they choose a donor whose tissues match those of the recipient as closely as
possible. Which of the following cell components are being matched?
A) plasma membrane phospholipids
B) plasma membrane proteins
C) cell-surface carbohydrates
D) plasma membrane cholesterols
E) cytoskeletal elements
7) Most of the functions of a cell membrane are performed by
A) glycolipids.
B) proteins.
C) phospholipids.
D) cholesterol.
E) nucleotides.
BSC1005 Biology General
Chapter 6
2
9) Relaying a message from a membrane receptor to a molecule that performs a specific function within a cell is called
A) signal transduction.
B) inhibition.
C) competition.
D) self-recognition.
E) selective permeability.
10) Plasma membranes are selectively permeable. This means that
A) anything can pass into or out of a cell as long as the membrane is intact and the cell is healthy.
B) the plasma membrane allows some substances to enter or leave a cell more easily than others.
C) glucose cannot ...
Bulk / Vesicle Transport
By Abdallah Muhammed Youssof, M.sc.
Department of pharmaceutics, college of pharmacy, King Saud University
Bio f4 chap_3_movement_of_substances_across_the_plasma_membrane
The document discusses the movement of substances across the plasma membrane. It explains that the plasma membrane is selectively permeable and uses different transport mechanisms like diffusion, facilitated diffusion, active transport, and osmosis. Substances move in and out of cells through the plasma membrane to fulfill cellular needs like obtaining nutrients and exporting waste. The key structures that allow for movement are the phospholipid bilayer and embedded transport proteins.
exam anatomy.docx
The lymphatic system is derived from the mesoderm germ layer. It includes the spleen and transports lymph from the lower extremities via lymph vessels, nodes, trunks, and ducts to the subclavian vein. The lymphatic system develops from the circulatory system during embryogenesis. Elephantiasis is an infection of the lymph vessels, often caused by the worm Wuchereria bancrofti. The document questions trace the flow of lymph through the body and identify the lymph nodes associated with drainage from different body regions.
2) cytochrome C is a small protein that acts as a mobile electron ca.pdf
2) cytochrome C is a small protein that acts as a mobile electron carrier in the respiratory chain.
and Cytochrome Oxidase transfers electrons to oxygen.
3)In eukaryotes, oxidative phosphorylation depends on the electrochemical gradient of protons
across the inner mitochondrial membrane.
4) ADP phosphorylation is the mechanism that couples the synthesis of ATP with the membrane
transport process that pumps protons.
5) Redox reactions are the transfer of electrons from one molecule to another.
Solution
2) cytochrome C is a small protein that acts as a mobile electron carrier in the respiratory chain.
and Cytochrome Oxidase transfers electrons to oxygen.
3)In eukaryotes, oxidative phosphorylation depends on the electrochemical gradient of protons
across the inner mitochondrial membrane.
4) ADP phosphorylation is the mechanism that couples the synthesis of ATP with the membrane
transport process that pumps protons.
5) Redox reactions are the transfer of electrons from one molecule to another..
Cell Physiology Spring 2016 Name Page 1 This test is .docx
Cell Physiology Spring 2016 Name:
Page 1
This test is to be completed on your own, the essay sections should not be the same as anyone else’s
(word for word) If that is what I find you both will receive 0 for this test.
Structure/Function Cell Part
1) Stores material within the cell (General)
2) The sites of protein synthesis
3) Transports materials within the cell
4) Organelle that manages or controls all the cell functions in a
eukaryotic cell
5) Digests excess or worn-out cell parts, food particles and invading
viruses or bacteria
6) Small bumps located on portions of the endoplasmic reticulum
7) Provides temporary storage of food, enzymes and waste products
8) Produces a usable form of energy for the cell
9) Packages proteins for transport out of the cell
10) The membrane surrounding the cell
11) Name for the collection of DNA in the nucleus of eukaryotic cells
12) Consist of hollow tubes which provide support for the cell
13) Small hair-like structures used for movement or sensing things
Cell Physiology Spring 2016 Name:
Page 2
1) In what organelle does cellular respiration take place?
2) Name two storage organelles?
3) What is the list of organelles that take part in protein synthesis?
4) How is the nucleus involved in protein synthesis?
5) What is the difference between rough ER and smooth ER? What is the ER doing that is
different in each case?
6) What are lysosomes? What types of molecules would be found inside a lysosome?
7) Why might a lysosome fuse with or link up with a food vacuole?
8) In what organelle do molecules move from the ER to the Golgi bodies?
Cell Physiology Spring 2016 Name:
Page 3
9) The pH of lysosomes is lower than that of the cytosol because of the action of
A. Na+ and OH− transport proteins in the lysosomal membrane
B. H+ and Cl− transport proteins in the plasma membrane
C. acid-producing enzymes in the lysosomal lumen
D. H+ and Cl− transport proteins in the lysosomal membrane
10) The phenomenon in which a chemical absorbs light at one wavelength and emits it at a specific
and longer wavelength is called
A. Differential interference contrast.
B. fluorescence.
C. deconvolution.
D. shadowing.
11) Which of the following could be used to visualize subcellular structure in living cells?
A. transmission electron microscopy
B. scanning electron microscopy
C. bright field microscopy
D. differential Fluorescence interference light microscopy
12) If a cellular homogenate were subjected to differential centrifugation, which of the following
would be expected to pellet first?
A. the endoplasmic reticulum
B. mitochondria
C. the cytosol
D. nuclei
Cell Physiology Spring 2016 Name:
Page 4
13) The disruption of a cell is necessary to release its organelles and contents for subsequent
isolation. One method, called _________________________________, uses ultrahigh-
...
11.10 (dr. husun bano)transport of substances across cell membrane
This document discusses various mechanisms of transport across cell membranes, including passive and active transport. Passive transport includes simple diffusion, facilitated diffusion, and osmosis. Simple diffusion is the random movement of small molecules like oxygen, carbon dioxide, and water through the lipid bilayer or protein channels. Facilitated diffusion uses carrier proteins to transport molecules like glucose and amino acids. Active transport requires energy and transports molecules like sodium, potassium, and calcium against their concentration gradients using pumps and channels.
Test Bank for Applied Pathophysiology A Conceptual Approach to theMechanisms ...
A Test bank is a ready-made electronic Q&A testing resource that is tailored to the contents of an individual textbook. Feedback is often provided on answers given by students, containing page references to the book.
Recommended
BSC1005 Biology General Chapter 6 1 Chapter 6 Cel.docx
BSC1005 Biology General
Chapter 6
1
Chapter 6: Cell Energy, Transport and Enzymes
1) Many of the enzymes that control a deep-sea firefly squid's ability to produce light energy from chemical energy are located
A) in membranes.
B) in the nucleus.
C) within chloroplasts.
D) outside of cells.
E) within mitochondria.
2) The fluid mosaic model describes the plasma membrane as consisting of
A) a phospholipid bilayer with embedded carbohydrates.
B) two layers of phospholipids with protein sandwiched between them.
C) a protein bilayer with embedded phospholipids.
D) carbohydrates, proteins, and phospholipids that can drift in the membrane.
E) individual proteins and phospholipids that can drift in a phospholipid bilayer.
3) Membrane phospholipids
A) have hydrophobic heads that face the center of the membrane and are shielded from water.
B) have hydrophilic tails that face outward and are exposed to water.
C) often have "kinks" in their tails caused by the presence of a double bond between carbons.
D) remain fluid because they are tightly packed against one another.
E) form impermeable layers for cells.
4) The cholesterol associated with animal cell membranes
A) is attached to membrane proteins and extends into the watery environment surrounding the cell.
B) helps to stabilize the cell membrane at body temperature.
C) makes the cell membrane fluid at room temperature.
D) is an abnormality resulting from a diet high in cholesterol.
E) helps solidify the membranes when the room temperature is below freezing.
5) A major function of glycoproteins and glycolipids in the cell membrane is to
A) glue cells together to form tissues.
B) allow the cells of an embryo to sort themselves into tissues and organs.
C) attach the cell membrane to the cytoskeleton.
D) help the cell resist swelling.
E) help the cell retain its shape.
6) When physicians perform an organ transplant, they choose a donor whose tissues match those of the recipient as closely as
possible. Which of the following cell components are being matched?
A) plasma membrane phospholipids
B) plasma membrane proteins
C) cell-surface carbohydrates
D) plasma membrane cholesterols
E) cytoskeletal elements
7) Most of the functions of a cell membrane are performed by
A) glycolipids.
B) proteins.
C) phospholipids.
D) cholesterol.
E) nucleotides.
BSC1005 Biology General
Chapter 6
2
9) Relaying a message from a membrane receptor to a molecule that performs a specific function within a cell is called
A) signal transduction.
B) inhibition.
C) competition.
D) self-recognition.
E) selective permeability.
10) Plasma membranes are selectively permeable. This means that
A) anything can pass into or out of a cell as long as the membrane is intact and the cell is healthy.
B) the plasma membrane allows some substances to enter or leave a cell more easily than others.
C) glucose cannot ...
Bulk / Vesicle Transport
By Abdallah Muhammed Youssof, M.sc.
Department of pharmaceutics, college of pharmacy, King Saud University
Bio f4 chap_3_movement_of_substances_across_the_plasma_membrane
The document discusses the movement of substances across the plasma membrane. It explains that the plasma membrane is selectively permeable and uses different transport mechanisms like diffusion, facilitated diffusion, active transport, and osmosis. Substances move in and out of cells through the plasma membrane to fulfill cellular needs like obtaining nutrients and exporting waste. The key structures that allow for movement are the phospholipid bilayer and embedded transport proteins.
exam anatomy.docx
The lymphatic system is derived from the mesoderm germ layer. It includes the spleen and transports lymph from the lower extremities via lymph vessels, nodes, trunks, and ducts to the subclavian vein. The lymphatic system develops from the circulatory system during embryogenesis. Elephantiasis is an infection of the lymph vessels, often caused by the worm Wuchereria bancrofti. The document questions trace the flow of lymph through the body and identify the lymph nodes associated with drainage from different body regions.
2) cytochrome C is a small protein that acts as a mobile electron ca.pdf
2) cytochrome C is a small protein that acts as a mobile electron carrier in the respiratory chain.
and Cytochrome Oxidase transfers electrons to oxygen.
3)In eukaryotes, oxidative phosphorylation depends on the electrochemical gradient of protons
across the inner mitochondrial membrane.
4) ADP phosphorylation is the mechanism that couples the synthesis of ATP with the membrane
transport process that pumps protons.
5) Redox reactions are the transfer of electrons from one molecule to another.
Solution
2) cytochrome C is a small protein that acts as a mobile electron carrier in the respiratory chain.
and Cytochrome Oxidase transfers electrons to oxygen.
3)In eukaryotes, oxidative phosphorylation depends on the electrochemical gradient of protons
across the inner mitochondrial membrane.
4) ADP phosphorylation is the mechanism that couples the synthesis of ATP with the membrane
transport process that pumps protons.
5) Redox reactions are the transfer of electrons from one molecule to another..
Cell Physiology Spring 2016 Name Page 1 This test is .docx
Cell Physiology Spring 2016 Name:
Page 1
This test is to be completed on your own, the essay sections should not be the same as anyone else’s
(word for word) If that is what I find you both will receive 0 for this test.
Structure/Function Cell Part
1) Stores material within the cell (General)
2) The sites of protein synthesis
3) Transports materials within the cell
4) Organelle that manages or controls all the cell functions in a
eukaryotic cell
5) Digests excess or worn-out cell parts, food particles and invading
viruses or bacteria
6) Small bumps located on portions of the endoplasmic reticulum
7) Provides temporary storage of food, enzymes and waste products
8) Produces a usable form of energy for the cell
9) Packages proteins for transport out of the cell
10) The membrane surrounding the cell
11) Name for the collection of DNA in the nucleus of eukaryotic cells
12) Consist of hollow tubes which provide support for the cell
13) Small hair-like structures used for movement or sensing things
Cell Physiology Spring 2016 Name:
Page 2
1) In what organelle does cellular respiration take place?
2) Name two storage organelles?
3) What is the list of organelles that take part in protein synthesis?
4) How is the nucleus involved in protein synthesis?
5) What is the difference between rough ER and smooth ER? What is the ER doing that is
different in each case?
6) What are lysosomes? What types of molecules would be found inside a lysosome?
7) Why might a lysosome fuse with or link up with a food vacuole?
8) In what organelle do molecules move from the ER to the Golgi bodies?
Cell Physiology Spring 2016 Name:
Page 3
9) The pH of lysosomes is lower than that of the cytosol because of the action of
A. Na+ and OH− transport proteins in the lysosomal membrane
B. H+ and Cl− transport proteins in the plasma membrane
C. acid-producing enzymes in the lysosomal lumen
D. H+ and Cl− transport proteins in the lysosomal membrane
10) The phenomenon in which a chemical absorbs light at one wavelength and emits it at a specific
and longer wavelength is called
A. Differential interference contrast.
B. fluorescence.
C. deconvolution.
D. shadowing.
11) Which of the following could be used to visualize subcellular structure in living cells?
A. transmission electron microscopy
B. scanning electron microscopy
C. bright field microscopy
D. differential Fluorescence interference light microscopy
12) If a cellular homogenate were subjected to differential centrifugation, which of the following
would be expected to pellet first?
A. the endoplasmic reticulum
B. mitochondria
C. the cytosol
D. nuclei
Cell Physiology Spring 2016 Name:
Page 4
13) The disruption of a cell is necessary to release its organelles and contents for subsequent
isolation. One method, called _________________________________, uses ultrahigh-
...
11.10 (dr. husun bano)transport of substances across cell membrane
This document discusses various mechanisms of transport across cell membranes, including passive and active transport. Passive transport includes simple diffusion, facilitated diffusion, and osmosis. Simple diffusion is the random movement of small molecules like oxygen, carbon dioxide, and water through the lipid bilayer or protein channels. Facilitated diffusion uses carrier proteins to transport molecules like glucose and amino acids. Active transport requires energy and transports molecules like sodium, potassium, and calcium against their concentration gradients using pumps and channels.
Test Bank for Applied Pathophysiology A Conceptual Approach to theMechanisms ...
A Test bank is a ready-made electronic Q&A testing resource that is tailored to the contents of an individual textbook. Feedback is often provided on answers given by students, containing page references to the book.
Membrana y transporte celular
The document discusses cellular membrane structure and function. It describes how phospholipids form the fluid bilayer of the plasma membrane with hydrophilic heads facing outward and hydrophobic tails inward. Integral and peripheral membrane proteins carry out various roles like transport, signaling, and enzymatic activity. The document then examines different cellular transport mechanisms like diffusion, osmosis, facilitated diffusion, active transport, endocytosis, and exocytosis. It provides examples of osmosis in isotonic, hypertonic, and hypotonic solutions and how cells maintain turgor pressure. Finally, it outlines the eukaryotic cell cycle with its interphase consisting of G1, S, and G2 phases followed by the M phase of mitosis and cytokines
CELL JUNCTIONS AND MEMBRANE TRANSPORT 2.docx
1. Diseases caused by mutations in genes encoding tight junction and connexin proteins include various forms of deafness, skin diseases, cancer, and neurological disorders.
2. Dysfunctions of adherens junctions and desmosomes can result in colon cancer and autoimmune blistering diseases respectively.
3. Abnormalities in sodium-potassium pumps and ion channels can cause conditions like cardiac failure, hypertension, muscle spasms, deafness, and cystic fibrosis.
d lower equal of A chanser prveein does which thr all of the above io.pdf
d lower equal of A chanser prveein does which thr all of the above ions the cell. a uses energy to
move sodum out ofte cell and potassium inoo energy. ions to move un ions out oree cell and ions
into the energy c moves sodum ions out of the cell and potassium ions into the cell without using
ions out of he cell and sodium ions the crll wil s owmasis is the diffusion of water. and other
small molecules. is the dinusion of water is the diffusion of water and small ions diffusion,
osmosis, facilitated which ef the following simple diffusion, (4) active transport, and vesicle
transport. 1,2 and 3 4 and 5 2, 3, 4, and 5 a. are bocha type of vesicle transport. b move very
large molecules eiher in orout of the cell c, are both a fome of d. all of the above 8. Which of the
following needs energy? (I passive transport, (2) active transport. 3) exocytosis, and (4) a. only 2
only c, 2 and 3 d 2, 3, and 4 Lesson 3.3: Vocabulary Name Class Marck the vocabulary word
with the proper ddininion. 1. transport a membrane without any additional energy requirement
across 2 the diffusion of water 3, type of vesicle transport that moves a substance into the cell 4,
type of vesicle transport that moves a substance out of the cell
Solution
3) A channel protein carries proteins and ions across the membrane.
4) sodium potassium pump pumps Na+ out of the cell and K+ inside the cell with using energy.
5) osmosis is diffusion of water and other small molecules
6) Diffusion and osmosis( 1 and 2)
7) Endocytosis and exocytosis are a type of vesicle transport. Endocytosis is engulfment and
exocytosis is transporting them out.
8) Active transport needs energy.
If O2 is found in high concentration on the outside of the cella).pdf
If O2 is found in high concentration on the outside of the cell:
a) energy will be expended to pump it inside the cell.
b) it will move inside the cell through a protein channel.
c) it will form a shell around the outside of the cell.
d) it will passively diffuse out of the cell.
e) none of the above.
Solution
b.it will move inside the cell through a protein channel.
Oxygen enters cells by passing through the cell membrane in a process called diffusion, which is
a transport process that does not require energy.Diffusion is the process in which a substance
moves from an area of high concentration (the environment outside cells) to an area of low
concentration (inside cells) through a semi-permeable mebrane.The cell is constantly using up
oxygen in different processes within the cell.As a result,the concentration of oxygen is lower
inside the cell than outside.Oxygen diffuses into the cell rather than out of it..
Transport Across Cell Membranes
The document discusses transport across cell membranes. It begins by describing the structure and function of cell membranes, including their semipermeable nature. It then explains various transport mechanisms like diffusion, osmosis, facilitated diffusion, active transport, and endocytosis/exocytosis that allow materials to move across membranes. Specific examples are given of how these transport mechanisms function in cells, lungs, and other organisms and systems to maintain homeostasis.
Tutorial mitosis
The document provides a tutorial on mitosis and signal transduction. It begins with a section on mitosis that includes 15 multiple choice questions testing understanding of the phases of mitosis and cellular division. It then covers signal transduction, defining key terms like ligands, receptors, and second messengers. This section includes 14 multiple choice questions on topics like G-protein coupled receptors, phosphorylation cascades, and the role of second messengers in cellular signaling pathways.
HSB Multiplechoice Questions (CSEC 2016)
This document contains multiple choice questions from chapters 1-7 of a biology textbook covering topics like cell structure and function, movement of substances, photosynthesis, nutrition, human digestive and respiratory systems. Each chapter contains 10 questions testing knowledge of key concepts and processes in the respective areas.
Which of the following is true about the nucleolusA)found in prok.pdf
Which of the following is true about the nucleolus?
A)found in prokaryotic cells in place of a true nucleus B)contains membran attached ribosomes
C)assembles ribosomal subunits D)all are true E)none are true
If the nucleolus was removed, this would deplete the RNA in the nucleus.
A)True B)Fals (Since most of the RNA in the nucleus is messenger RNA)
If the nucleolus was removed synthesis of new ribosomes would not occur.
A)True B)False (all the ribosomes a cell uses in its lifetime are present in the cytoplasm when
the cell first forms)
Which of the following is true about nuclear membran permeability?
A)hydrophilic(aqueous) channels are larger than those of the plasma membrane B)large proteins
can pass in and out of the nucleus in fully folded form in an aqueous solution(passage does not
require hydrophobic leaders and membrane attachment) C)movement of large molecule through
pores require assistance of transporter proteins D)the outer layer of the nuclear membrane is
continuous with the endoplasmic reticulum, therefore large molecules produced in the nucleus
can directly enter the ER lumen without needing to be transported through a membrane. E) all
are true F)none are true
Enzymes used for DNA replication are made on ribosomes located outside the nucleus.
A)True B)Flase
Solution
Answer :
Question number 1: The correct among all the statement is C (assembles ribosomal subunits)
Explanation : Nucleolus is the darkly stained, circular suborganelle which lacks any limiting
membrane and is formed during the interphase. it is site where ribosomes are manufactured..
Where is [Cl] normally highest, inside or outside of a cell How do.pdf
Where is [Cl\'] normally highest, inside or outside of a cell? How does this compare to [Na*] in
a cell? If the membrane became permeable to Cl^-, what direction would Cl^- move based on its
chemical gradient? In a healthy person, when the CFTR channel opens, Cl^- moves from the
inside of the cell to membranes, and your response to Question 2 as you answer) What direction
will water move in this system when the CFTR is open? If the CFTR doesn\'t work correctly due
to a mutation, Cl^- movement is blocked and an Inside Cell abnormally thick sticky mucus is
produced on the outside of the cell. This mucus clogs the airways in the lungs, and increases the
risk of infection by bacteria. Figure 2 illustrates a mutant CFTR channel in the epithelial cells
lining the lung.
Solution
1. Mostly Chloride and Sodium are present in high concentrations in the extracellular region and
low concentration in the intra cellular region. This is the reason behind generation of membrane
potential as potassium is present at low concentrations in the extracellular region and higher in
intracellular areas.
2. Since the concentration of Chloride is relatively higher in the extracellular region, if the
membrane becomes permeable, it would lead to movement of chloride ions from extracellular to
intracellular region because of the existing concentration gradient.
3. CFTR channels stand for Cystic fibrosis Transmembrane Conductance Regulator Channels. It
is an ABC transporter class protein which conducts chloride ions and water along with
thiocynate ions across epithelial cell membranes. It is responsible for carrying out active
transport of Chloride ions against the concentration gradient by the use of ATP as well as
phosphorylation. That is why the movement of chloride ions is possible against the concentration
gradient.
4. The ionic concentration of the mucus slowly increases with the functioning of CFTR channel
and this leads to movement of water from the inside to the outside via osmosis..
Ib ch 1 question-answer
This document contains a biology exam with multiple choice questions testing knowledge of cell structure and function. It includes questions about:
- Striated muscle cells and exceptions to the cell theory
- How stem cells can help treat Stargardt's disease
- Identifying organelles such as mitochondria in electron micrographs
- Where 70S ribosomes are located and membrane protein functions
- Osmosis and the effects of solutions of different salt concentrations on cells
- Types of cellular movement such as facilitated diffusion and active transport
- Cell division processes like mitosis and cytokinesis
- Evidence for the endosymbiotic theory from mitochondrial DNA
- Key aspects of the cell theory including that cells come from pre-
29- Which of the following is not considered a microorganism A- mosqui.docx
29. Which of the following is not considered a microorganism A. mosquito B. protozoa C. bacteria D. viruses 30. The transfer of genes during bacterial conjugation involves rigid, tubular appendages called A. flagella B. cilia C. fimbriae D. pili 31. Rod shaped bacteria arranged in a chain are known as A. spirochetes B. spirilla C. streptobacilli D. coccus 32. Which of the following statements about protozoans is false? a) They are unicellular eukaryotes that demonstrate animal-like characteristics in both food consumption and motility. b) They only enter into parasitic relationships with a host. c) They have cellular features like flagella, cilia and pseudopodia that help attain food and aid movement. d) They may have complex life cycles alternating between cyst and trophozoite stages. 33. Which description(s) is(are) true of algae? a) They are all singled celled organisms. b) They are found in only saltwater habitats. c) The oxygen gas produced and exported by these photosynthetic microbes makes life possible for all organisms using aerobic respiration. d) Numerous pathogens are classified as algae. 34. Which of the following is a tenet of the Cell Theory? 1) All organisms are composed of one or more cells. 2) The cell is the structural unit of life. 3) Cells can arise only by division from a preexisting cell. 4) Cells divide only by fission. a) 1 b) 2 c) 3 d) 4 e) 1,2 and 3 35. The structure of the plasma membrane is most appropriately described as a) a thick peptidoglycan layer with lipoteichoic acid b) a phospholipid bilayer with proteins c) a semi-permeable monolayer with phosphate groups d) a thin murien layer with high amino acid content
.
1. Which class of chemical messenger facilitates WBC formation in bo.docx
1. Which class of chemical messenger facilitates WBC formation in bone marrow?
A Interleukins b. tumor necrotic factors c. colony stimulating factors d. Interferons
2. Often a virus infected cell will release ___________to prevent spread of the infection.
a. histamine b. Interferon c. compliment d. perforni
3. In the classical pathway of complement activation:
a. compliment is activated within liver cells & released into the blood
b. complement binds to an antibody that is bound to a foreign substance
c. complement bonds with polysaccharides on a microbial cell wall
d. complement inhibits inflammation & binds to apianins
4. A membrane attack complex is a protein that:
a. triggers phagocytes of a target cell by a nearby macrophage or Europhile
b. Forms a channel in the target cell membrane that causes cytolysis
c. links a pathogen to a RBC so that it is carried to the liver or spleen
d. stimulates basophils to attack a multicultural parasite in the body
5. Exudate refers to:
a. blood that escapes capillaries passes beyond the skin and leaves the body.
b. increased perfussion of capillary beds within the region of an injury
c. lymph that flows away from the heart and toward the site of injury.
d. fluid that leaves capillaries to “wash” the interstitial space of an injured tissue
e. clotting proteins that wall off microbes and prevent them from spreading through the bloodstream.
6.Which is not one of the cardinal signs of inflammation?
a. heat
b.redness
c. loss of function
d. numbness
e. swelling
7. Sustained fevers that are 1’C above normal core body temperature usually lead to irreversible brain damage:
a. True
b. False
c. Not sure
8. Antigens are:
a. something made by a WBC to destroy a pathogen
b. something that an antibody or T-lymphocyte binds to
.
Edema
Examville.com is an online learning platform that offers practice tests, live classes, tutoring, study guides, Q&A, and premium content to help students prepare for exams. The site provides various resources for test preparation across different subject areas. Users can access these materials for free or subscribe to premium offerings.
Pulmonary pathology restrict and infection
1. The document discusses two major types of lung disease: obstructive and restrictive. Obstructive diseases involve limitations of airflow while restrictive diseases involve reduced lung volume.
2. Specific lung diseases that are mentioned include asthma, emphysema, chronic bronchitis, idiopathic pulmonary fibrosis (IPF), and sarcoidosis. IPF involves scarring of the lungs and has a poor prognosis.
3. Environmental exposures like asbestos, silica, and coal dust can also cause lung diseases like asbestosis, silicosis, and black lung disease respectively if particles are inhaled. Long term effects include fibrosis and cancer.
Cet
The document discusses various topics related to cell physiology:
1) It discusses the sodium-potassium pump, where ATP is used to extrude 2 sodium ions out of the cell in exchange for 3 potassium ions into the cell.
2) It mentions that lysosomes are organelles responsible for breaking down proteins and lipids.
3) It lists different types of transport mechanisms, including diffusion, osmosis, and active transport.
BIOL 101 EXAM The following general directions apply to thi.docx
BIOL 101 EXAM
The following general directions apply to this exam: This exam is worth a total of 125 points. Multiple choice questions #1-50 are worth 1 point each. Multiple choice questions #51-57 are worth 2 points each. Choose 6 of 7 essay questions #58-64, which are worth 10 points each. Please provide answers on the answer sheets provided at the end of the exam. I recommend that you print out the exam, answer the questions, then copy the answers onto the answer sheets. Please submit only the answer sheets into your assignment folder
GOOD LUCK! Thanks for taking the course,
********************************************************************** MULTIPLE CHOICE QUESTIONS – 1 POINT EACH – 50 POINTS TOTAL: On the answer sheet, indicate the letter that represents the best answer to each of the multiple choice questions below.
1. In science, a hypothesis must be A) a known fact B) testable C) derived from a theory
D) able to be proven absolutely true
2. Which of the following includes all the others?
A) atom B) cell C) organism D) ecosystem
3. A carbon atom of mass number 12 and a carbon atom of mass number 14 are
A) covalent B) compounds C) ions D) isotopes
4. A chlorine atom has 17 protons, 18 neutrons, and 17 electrons. The atomic number of
chlorine isA) 8 B) 17 C) 35 D) 52
5. If you place the probe of a pH meter in lye or sodium hydroxide (NaOH), it will read
pH 14. Sodium hydroxide is A) an acid B) neutralC) a base
6. This polysaccharide forms fibers that are a major component of plant cell walls:
A) glucose B) starch C) cellulose D) glycogen
7. Glycerol is a building block of A) starch B) enzymes C) vegetable oil D) DNA
8. Which of these types of molecules contain nitrogen?
A) polysaccharides B) proteins C) steroids
9. Prokaryotic cells, with no nucleus or membranous organelles, are found in
A) animals B) bacteria C) fungi D) plants
10. The main function of a ribosome is to A) extract energy from glucose
B) synthesize glucose C) store food in the form of fat
D) synthesize proteins
11. Mitochondria A) package proteins for secretion from cell B) contain chromosomes
C) are sites of oxidation of glucose to generate ATP D) synthesize proteins
12. The plasma membrane consists of A) a single layer of phospholipid molecules
B) a double layer of phospholipid molecules in which proteins are embedded
C) several layers of protein and carbohydrate molecules
D) a triple layer of phospholipids and carbohydrates
13. The movement of molecules from a region of low concentration across a membrane
to a region of high concentration by use of ATP energy is A) active transport
B)diffusion C) passive transport D) osmosis
14. The oxygen in our atmosphere is produced by A) greenhouse effect
B) cellular respiration C) photosynthesis D) volcanic ...
2 A&P I The Cell 10
The document summarizes key concepts about cell structure and function from a biology textbook chapter. It describes the cell theory, the structure and functions of the cell membrane and transport mechanisms like diffusion, osmosis, and active transport. It also outlines the structures and functions of major cell organelles like the nucleus, endoplasmic reticulum, Golgi bodies, lysosomes, vacuoles, mitochondria, microtubules, and cilia/flagella. Throughout, it emphasizes that a cell's form relates to its functions within the body.
Plasma membrane and transport system
The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. . The plasma membrane consists of a lipid bilayer that is semipermeable. The plasma membrane regulates the transport of materials entering and exiting the cell.
The city school 9 t r.s
This document contains a biology test with 9 multiple choice questions about plant cell transport processes. The questions cover topics like active transport of ions into plant cells, the process that moves sugar from leaf cells into phloem tissue, permeability of the plant cell wall and membrane, examples of diffusion in plants, water uptake by plant roots via osmosis, materials that diffusion can occur in, effects of a human red blood cell placed in a salt solution, and membrane transport methods that don't require protein channels or carriers.
Plasma membrane and_transport system
Plasma membrane is boundary of the cytoplasm.it is also known as biological membrane & unit membrane.
1) �Cu�l de las AD es falsa con respecto a las infecciones por virus.pdf
1) Cul de las AD es falsa con respecto a las infecciones por virus de ADN y las infecciones por
virus de ARN no retrovirales?
A. Los virus de ARN pueden tener un genoma monocatenario (+) o (-) o un genoma ARN de
doble cadena.
B. Los virus de ADN generalmente deben ingresar al ncleo de la clula husped que infectan.
C. Un soporte de ARN de sentido (-) producido por un virus de ARN podra servir como ARNm
y traducirse directamente en protena
D. Los virus de ADN generalmente se ensamblan en el ncleo de la clula husped.
E. Ninguno de AD es falso; todos son verdad
2) Qu declaracin entre AD es falsa con respecto a los virus de ARN?
A. la replicacin del genoma del retrovirus implica la sntesis de un intermediario de ADN
B. algunos poseen una ARN polimerasa dependiente de ARN
C. el genoma de un virus de ARN monocatenario (+), como el virus del resfriado comn, puede
servir directamente como ARNm y traducirse
D. cuando se copia un genoma monocatenario (-), la copia es una cadena (+) de ARN
E. nada de AD es falso.
1) La selecci�n sexual elige el fenotipo que le dar� a la descendenc.pdf
1) La seleccin sexual elige el fenotipo que le dar a la descendencia la mayor capacidad de
supervivencia.
2) La diferencia entre la evolucin lamarckiana y la darwiniana cuando se produce el cambio.
Relaciona el tipo de evolucin con el momento en que ocurre.
evolucin lamarckiana
evolucin darwiniana
entre generaciones
Dentro de las generaciones
Verdadero FALSO.
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Membrana y transporte celular
The document discusses cellular membrane structure and function. It describes how phospholipids form the fluid bilayer of the plasma membrane with hydrophilic heads facing outward and hydrophobic tails inward. Integral and peripheral membrane proteins carry out various roles like transport, signaling, and enzymatic activity. The document then examines different cellular transport mechanisms like diffusion, osmosis, facilitated diffusion, active transport, endocytosis, and exocytosis. It provides examples of osmosis in isotonic, hypertonic, and hypotonic solutions and how cells maintain turgor pressure. Finally, it outlines the eukaryotic cell cycle with its interphase consisting of G1, S, and G2 phases followed by the M phase of mitosis and cytokines
CELL JUNCTIONS AND MEMBRANE TRANSPORT 2.docx
1. Diseases caused by mutations in genes encoding tight junction and connexin proteins include various forms of deafness, skin diseases, cancer, and neurological disorders.
2. Dysfunctions of adherens junctions and desmosomes can result in colon cancer and autoimmune blistering diseases respectively.
3. Abnormalities in sodium-potassium pumps and ion channels can cause conditions like cardiac failure, hypertension, muscle spasms, deafness, and cystic fibrosis.
d lower equal of A chanser prveein does which thr all of the above io.pdf
d lower equal of A chanser prveein does which thr all of the above ions the cell. a uses energy to
move sodum out ofte cell and potassium inoo energy. ions to move un ions out oree cell and ions
into the energy c moves sodum ions out of the cell and potassium ions into the cell without using
ions out of he cell and sodium ions the crll wil s owmasis is the diffusion of water. and other
small molecules. is the dinusion of water is the diffusion of water and small ions diffusion,
osmosis, facilitated which ef the following simple diffusion, (4) active transport, and vesicle
transport. 1,2 and 3 4 and 5 2, 3, 4, and 5 a. are bocha type of vesicle transport. b move very
large molecules eiher in orout of the cell c, are both a fome of d. all of the above 8. Which of the
following needs energy? (I passive transport, (2) active transport. 3) exocytosis, and (4) a. only 2
only c, 2 and 3 d 2, 3, and 4 Lesson 3.3: Vocabulary Name Class Marck the vocabulary word
with the proper ddininion. 1. transport a membrane without any additional energy requirement
across 2 the diffusion of water 3, type of vesicle transport that moves a substance into the cell 4,
type of vesicle transport that moves a substance out of the cell
Solution
3) A channel protein carries proteins and ions across the membrane.
4) sodium potassium pump pumps Na+ out of the cell and K+ inside the cell with using energy.
5) osmosis is diffusion of water and other small molecules
6) Diffusion and osmosis( 1 and 2)
7) Endocytosis and exocytosis are a type of vesicle transport. Endocytosis is engulfment and
exocytosis is transporting them out.
8) Active transport needs energy.
If O2 is found in high concentration on the outside of the cella).pdf
If O2 is found in high concentration on the outside of the cell:
a) energy will be expended to pump it inside the cell.
b) it will move inside the cell through a protein channel.
c) it will form a shell around the outside of the cell.
d) it will passively diffuse out of the cell.
e) none of the above.
Solution
b.it will move inside the cell through a protein channel.
Oxygen enters cells by passing through the cell membrane in a process called diffusion, which is
a transport process that does not require energy.Diffusion is the process in which a substance
moves from an area of high concentration (the environment outside cells) to an area of low
concentration (inside cells) through a semi-permeable mebrane.The cell is constantly using up
oxygen in different processes within the cell.As a result,the concentration of oxygen is lower
inside the cell than outside.Oxygen diffuses into the cell rather than out of it..
Transport Across Cell Membranes
The document discusses transport across cell membranes. It begins by describing the structure and function of cell membranes, including their semipermeable nature. It then explains various transport mechanisms like diffusion, osmosis, facilitated diffusion, active transport, and endocytosis/exocytosis that allow materials to move across membranes. Specific examples are given of how these transport mechanisms function in cells, lungs, and other organisms and systems to maintain homeostasis.
Tutorial mitosis
The document provides a tutorial on mitosis and signal transduction. It begins with a section on mitosis that includes 15 multiple choice questions testing understanding of the phases of mitosis and cellular division. It then covers signal transduction, defining key terms like ligands, receptors, and second messengers. This section includes 14 multiple choice questions on topics like G-protein coupled receptors, phosphorylation cascades, and the role of second messengers in cellular signaling pathways.
HSB Multiplechoice Questions (CSEC 2016)
This document contains multiple choice questions from chapters 1-7 of a biology textbook covering topics like cell structure and function, movement of substances, photosynthesis, nutrition, human digestive and respiratory systems. Each chapter contains 10 questions testing knowledge of key concepts and processes in the respective areas.
Which of the following is true about the nucleolusA)found in prok.pdf
Which of the following is true about the nucleolus?
A)found in prokaryotic cells in place of a true nucleus B)contains membran attached ribosomes
C)assembles ribosomal subunits D)all are true E)none are true
If the nucleolus was removed, this would deplete the RNA in the nucleus.
A)True B)Fals (Since most of the RNA in the nucleus is messenger RNA)
If the nucleolus was removed synthesis of new ribosomes would not occur.
A)True B)False (all the ribosomes a cell uses in its lifetime are present in the cytoplasm when
the cell first forms)
Which of the following is true about nuclear membran permeability?
A)hydrophilic(aqueous) channels are larger than those of the plasma membrane B)large proteins
can pass in and out of the nucleus in fully folded form in an aqueous solution(passage does not
require hydrophobic leaders and membrane attachment) C)movement of large molecule through
pores require assistance of transporter proteins D)the outer layer of the nuclear membrane is
continuous with the endoplasmic reticulum, therefore large molecules produced in the nucleus
can directly enter the ER lumen without needing to be transported through a membrane. E) all
are true F)none are true
Enzymes used for DNA replication are made on ribosomes located outside the nucleus.
A)True B)Flase
Solution
Answer :
Question number 1: The correct among all the statement is C (assembles ribosomal subunits)
Explanation : Nucleolus is the darkly stained, circular suborganelle which lacks any limiting
membrane and is formed during the interphase. it is site where ribosomes are manufactured..
Where is [Cl] normally highest, inside or outside of a cell How do.pdf
Where is [Cl\'] normally highest, inside or outside of a cell? How does this compare to [Na*] in
a cell? If the membrane became permeable to Cl^-, what direction would Cl^- move based on its
chemical gradient? In a healthy person, when the CFTR channel opens, Cl^- moves from the
inside of the cell to membranes, and your response to Question 2 as you answer) What direction
will water move in this system when the CFTR is open? If the CFTR doesn\'t work correctly due
to a mutation, Cl^- movement is blocked and an Inside Cell abnormally thick sticky mucus is
produced on the outside of the cell. This mucus clogs the airways in the lungs, and increases the
risk of infection by bacteria. Figure 2 illustrates a mutant CFTR channel in the epithelial cells
lining the lung.
Solution
1. Mostly Chloride and Sodium are present in high concentrations in the extracellular region and
low concentration in the intra cellular region. This is the reason behind generation of membrane
potential as potassium is present at low concentrations in the extracellular region and higher in
intracellular areas.
2. Since the concentration of Chloride is relatively higher in the extracellular region, if the
membrane becomes permeable, it would lead to movement of chloride ions from extracellular to
intracellular region because of the existing concentration gradient.
3. CFTR channels stand for Cystic fibrosis Transmembrane Conductance Regulator Channels. It
is an ABC transporter class protein which conducts chloride ions and water along with
thiocynate ions across epithelial cell membranes. It is responsible for carrying out active
transport of Chloride ions against the concentration gradient by the use of ATP as well as
phosphorylation. That is why the movement of chloride ions is possible against the concentration
gradient.
4. The ionic concentration of the mucus slowly increases with the functioning of CFTR channel
and this leads to movement of water from the inside to the outside via osmosis..
Ib ch 1 question-answer
This document contains a biology exam with multiple choice questions testing knowledge of cell structure and function. It includes questions about:
- Striated muscle cells and exceptions to the cell theory
- How stem cells can help treat Stargardt's disease
- Identifying organelles such as mitochondria in electron micrographs
- Where 70S ribosomes are located and membrane protein functions
- Osmosis and the effects of solutions of different salt concentrations on cells
- Types of cellular movement such as facilitated diffusion and active transport
- Cell division processes like mitosis and cytokinesis
- Evidence for the endosymbiotic theory from mitochondrial DNA
- Key aspects of the cell theory including that cells come from pre-
29- Which of the following is not considered a microorganism A- mosqui.docx
29. Which of the following is not considered a microorganism A. mosquito B. protozoa C. bacteria D. viruses 30. The transfer of genes during bacterial conjugation involves rigid, tubular appendages called A. flagella B. cilia C. fimbriae D. pili 31. Rod shaped bacteria arranged in a chain are known as A. spirochetes B. spirilla C. streptobacilli D. coccus 32. Which of the following statements about protozoans is false? a) They are unicellular eukaryotes that demonstrate animal-like characteristics in both food consumption and motility. b) They only enter into parasitic relationships with a host. c) They have cellular features like flagella, cilia and pseudopodia that help attain food and aid movement. d) They may have complex life cycles alternating between cyst and trophozoite stages. 33. Which description(s) is(are) true of algae? a) They are all singled celled organisms. b) They are found in only saltwater habitats. c) The oxygen gas produced and exported by these photosynthetic microbes makes life possible for all organisms using aerobic respiration. d) Numerous pathogens are classified as algae. 34. Which of the following is a tenet of the Cell Theory? 1) All organisms are composed of one or more cells. 2) The cell is the structural unit of life. 3) Cells can arise only by division from a preexisting cell. 4) Cells divide only by fission. a) 1 b) 2 c) 3 d) 4 e) 1,2 and 3 35. The structure of the plasma membrane is most appropriately described as a) a thick peptidoglycan layer with lipoteichoic acid b) a phospholipid bilayer with proteins c) a semi-permeable monolayer with phosphate groups d) a thin murien layer with high amino acid content
.
1. Which class of chemical messenger facilitates WBC formation in bo.docx
1. Which class of chemical messenger facilitates WBC formation in bone marrow?
A Interleukins b. tumor necrotic factors c. colony stimulating factors d. Interferons
2. Often a virus infected cell will release ___________to prevent spread of the infection.
a. histamine b. Interferon c. compliment d. perforni
3. In the classical pathway of complement activation:
a. compliment is activated within liver cells & released into the blood
b. complement binds to an antibody that is bound to a foreign substance
c. complement bonds with polysaccharides on a microbial cell wall
d. complement inhibits inflammation & binds to apianins
4. A membrane attack complex is a protein that:
a. triggers phagocytes of a target cell by a nearby macrophage or Europhile
b. Forms a channel in the target cell membrane that causes cytolysis
c. links a pathogen to a RBC so that it is carried to the liver or spleen
d. stimulates basophils to attack a multicultural parasite in the body
5. Exudate refers to:
a. blood that escapes capillaries passes beyond the skin and leaves the body.
b. increased perfussion of capillary beds within the region of an injury
c. lymph that flows away from the heart and toward the site of injury.
d. fluid that leaves capillaries to “wash” the interstitial space of an injured tissue
e. clotting proteins that wall off microbes and prevent them from spreading through the bloodstream.
6.Which is not one of the cardinal signs of inflammation?
a. heat
b.redness
c. loss of function
d. numbness
e. swelling
7. Sustained fevers that are 1’C above normal core body temperature usually lead to irreversible brain damage:
a. True
b. False
c. Not sure
8. Antigens are:
a. something made by a WBC to destroy a pathogen
b. something that an antibody or T-lymphocyte binds to
.
Edema
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Pulmonary pathology restrict and infection
1. The document discusses two major types of lung disease: obstructive and restrictive. Obstructive diseases involve limitations of airflow while restrictive diseases involve reduced lung volume.
2. Specific lung diseases that are mentioned include asthma, emphysema, chronic bronchitis, idiopathic pulmonary fibrosis (IPF), and sarcoidosis. IPF involves scarring of the lungs and has a poor prognosis.
3. Environmental exposures like asbestos, silica, and coal dust can also cause lung diseases like asbestosis, silicosis, and black lung disease respectively if particles are inhaled. Long term effects include fibrosis and cancer.
Cet
The document discusses various topics related to cell physiology:
1) It discusses the sodium-potassium pump, where ATP is used to extrude 2 sodium ions out of the cell in exchange for 3 potassium ions into the cell.
2) It mentions that lysosomes are organelles responsible for breaking down proteins and lipids.
3) It lists different types of transport mechanisms, including diffusion, osmosis, and active transport.
BIOL 101 EXAM The following general directions apply to thi.docx
BIOL 101 EXAM
The following general directions apply to this exam: This exam is worth a total of 125 points. Multiple choice questions #1-50 are worth 1 point each. Multiple choice questions #51-57 are worth 2 points each. Choose 6 of 7 essay questions #58-64, which are worth 10 points each. Please provide answers on the answer sheets provided at the end of the exam. I recommend that you print out the exam, answer the questions, then copy the answers onto the answer sheets. Please submit only the answer sheets into your assignment folder
GOOD LUCK! Thanks for taking the course,
********************************************************************** MULTIPLE CHOICE QUESTIONS – 1 POINT EACH – 50 POINTS TOTAL: On the answer sheet, indicate the letter that represents the best answer to each of the multiple choice questions below.
1. In science, a hypothesis must be A) a known fact B) testable C) derived from a theory
D) able to be proven absolutely true
2. Which of the following includes all the others?
A) atom B) cell C) organism D) ecosystem
3. A carbon atom of mass number 12 and a carbon atom of mass number 14 are
A) covalent B) compounds C) ions D) isotopes
4. A chlorine atom has 17 protons, 18 neutrons, and 17 electrons. The atomic number of
chlorine isA) 8 B) 17 C) 35 D) 52
5. If you place the probe of a pH meter in lye or sodium hydroxide (NaOH), it will read
pH 14. Sodium hydroxide is A) an acid B) neutralC) a base
6. This polysaccharide forms fibers that are a major component of plant cell walls:
A) glucose B) starch C) cellulose D) glycogen
7. Glycerol is a building block of A) starch B) enzymes C) vegetable oil D) DNA
8. Which of these types of molecules contain nitrogen?
A) polysaccharides B) proteins C) steroids
9. Prokaryotic cells, with no nucleus or membranous organelles, are found in
A) animals B) bacteria C) fungi D) plants
10. The main function of a ribosome is to A) extract energy from glucose
B) synthesize glucose C) store food in the form of fat
D) synthesize proteins
11. Mitochondria A) package proteins for secretion from cell B) contain chromosomes
C) are sites of oxidation of glucose to generate ATP D) synthesize proteins
12. The plasma membrane consists of A) a single layer of phospholipid molecules
B) a double layer of phospholipid molecules in which proteins are embedded
C) several layers of protein and carbohydrate molecules
D) a triple layer of phospholipids and carbohydrates
13. The movement of molecules from a region of low concentration across a membrane
to a region of high concentration by use of ATP energy is A) active transport
B)diffusion C) passive transport D) osmosis
14. The oxygen in our atmosphere is produced by A) greenhouse effect
B) cellular respiration C) photosynthesis D) volcanic ...
2 A&P I The Cell 10
The document summarizes key concepts about cell structure and function from a biology textbook chapter. It describes the cell theory, the structure and functions of the cell membrane and transport mechanisms like diffusion, osmosis, and active transport. It also outlines the structures and functions of major cell organelles like the nucleus, endoplasmic reticulum, Golgi bodies, lysosomes, vacuoles, mitochondria, microtubules, and cilia/flagella. Throughout, it emphasizes that a cell's form relates to its functions within the body.
Plasma membrane and transport system
The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. . The plasma membrane consists of a lipid bilayer that is semipermeable. The plasma membrane regulates the transport of materials entering and exiting the cell.
The city school 9 t r.s
This document contains a biology test with 9 multiple choice questions about plant cell transport processes. The questions cover topics like active transport of ions into plant cells, the process that moves sugar from leaf cells into phloem tissue, permeability of the plant cell wall and membrane, examples of diffusion in plants, water uptake by plant roots via osmosis, materials that diffusion can occur in, effects of a human red blood cell placed in a salt solution, and membrane transport methods that don't require protein channels or carriers.
Plasma membrane and_transport system
Plasma membrane is boundary of the cytoplasm.it is also known as biological membrane & unit membrane.
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d lower equal of A chanser prveein does which thr all of the above io.pdf
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29- Which of the following is not considered a microorganism A- mosqui.docx
1. Which class of chemical messenger facilitates WBC formation in bo.docx
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BIOL 101 EXAM The following general directions apply to thi.docx
BIOL 101 EXAM The following general directions apply to thi.docx
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1) Las especies con tiempos de generacin ms largos deben tener:
a. Ms divergencia de intrones a lo largo del tiempo que las especies con longitudes de generacin
cortas
b. Menos divergencia de intrones a lo largo del tiempo que las especies con longitudes de
generacin cortas
C. La misma divergencia de intrones a lo largo del tiempo que las especies con longitudes de
generacin cortas
d. Los intrones no acumulan divergencia con el tiempo porque son empalmados por
espliceosomas.
2) Qu grupo debe considerarse monofiltico (suponga que cada grupo contiene las especies
tradicionalmente asignadas):
a. protistas
b. eucariotas
C. procariotas
d. Los grandes simios (asumiendo que los humanos no son considerados grandes simios)
mi. Reptiles (suponiendo que las aves no se consideren reptiles)
3) El patrn descrito por la teora neutral:
a. Significa que Darwin estaba equivocado sobre los mecanismos de la seleccin natural.
b. Opera principalmente a travs de la deriva gentica.
C. Juega un papel importante en la especiacin simptrica.
d. Se puede ver en el registro fsil.
4) Es probable que un frasco de mantequilla de man en el estante de la tienda durante algunas
semanas contenga una hormiga recin formada si se le da:
a. Iluminacin
b. Hidrgeno, metano, amonaco y agua
C. Una atmsfera altamente reductora
d. Todo lo anterior
5) Una tortuga muere cuando es enterrada en lava. Al excavar el fsil varios miles de aos despus,
cul ser la verdadera?
a. C14:N14 > K40:Ar40
b. K40:Ar40 > C14:N14
C. C14:N14 = K40:Ar40
d. No hay suficiente informacin para responder a esto
mi.
Ninguno de estos sera suficiente para producir una hormiga a partir de materia no viva en unas
pocas semanas..
1) Seg�n Henri Fayol, los planes efectivos deben tener las cualidade.pdf
1) Segn Henri Fayol, los planes efectivos deben tener las cualidades de unidad, continuidad,
precisin y flexibilidad. Describa cada cualidad en el contexto de la planificacin y proporcione un
ejemplo en el que la falta de esa cualidad sera un problema para una organizacin.
2). Haga una lista de una cadena de supermercados en su ciudad e identifique sus fortalezas y
debilidades..
1) Run the systemctl status httpd command to show that your web se.pdf
1) Run the 'systemctl status httpd' command to show that your web server is running. Show that
you have implemented ssl certificate on your system by using https:// in the url in the final step
when you open your web page
2) Show that you have configured your webserver to use the public_html folder for all users by
showing the changes to userdir.conf file
3) Show the web page you have created in public_html directory
5) Change to the user/public_html directory and display the contents of the directory and then
display the .htaccess file
6) Navigate to the /etc/httpd/conf directory and show the configuration files that implement the
htaccess
7) Open a browser and display the index.html file.
1) La siguiente oraci�n tiene errores, podr�a ser prolija, entrecort.pdf
1) La siguiente oracin tiene errores, podra ser prolija, entrecortada, incmoda o tener dos ideas.
Vuelve a escribir la oracin e incluye puntuacin.
Despus de considerarlo detenidamente, el viaje fue aprobado por la Sra. Mc Nealy. (Usar voz
activa).
2) El efecto total de su carta en el lector determinar si l o ella reaccionar de la manera que usted
desea. Qu significa la siguiente pregunta: la carta har su trabajo especfico y tambin generar
buena voluntad?.
1) In the study of an outbreak of an infectious disease, plotting an.pdf
1) In the study of an outbreak of an infectious disease, plotting an epidemic curve is useful
because: a. It helps to determine what type of outbreak (e.g., single-source, person-to-person) has
occurred. b. It shows whether herd immunity has occurred. c. It helps to deter mine the median
incubation period. d. a and c. e. a, b, and c.
2) Which of the following is characteristic of a single-exposure, common-vehicle outbreak? a.
Frequent secondary cases. b. Increasing sevarity with increasing age. c. Explosive. d. Cases
include both people who have been exposed and those who have not been exposed. e. all of the
above.
1) Install and run an Apache secure web server on your Linux OS. 2) .pdf
1) Install and run an Apache secure web server on your Linux OS. 2) Configure your webserver
to use the public_html folder for all users. 3) Create a simple web page in a user's public_html
directory. 1) Run the 'systemctl status httpd' command to show that your web server is running.
Show that you have implemented ssl certificate on your system by using https:// in the url in the
final step when you open your web page (7 marks) 2) Show that you have configured your
webserver to use the public_html folder for all users by showing the changes to userdir.conf file
(2 marks) 3) Show the web page you have created in public_html directory (2 marks) 5) Change
to the user/public_html directory and display the contents of the directory and then display the
.htaccess file (2 marks) 6) Navigate to the /etc/httpd/conf directory and show the configuration
files that implement the htaccess 1 mark 7) Open a browser and display the index.html file.
1) La expresi�n g�nica diferencial ocurre en cada una de las siguien.pdf
1) La expresin gnica diferencial ocurre en cada una de las siguientes bacterias, EXCEPTO
A) Bacilo.
B) Micobacterias.
C) Anabaena.
D) Caulobacter.
2) F funciona como un(a) ________ durante la formacin de endosporas.
A) factor de transcripcin
B) factor anti-sigma
C) proteasa
D) ARNasa.
1) El objetivo del inventario de seguridad es a. reemplace las uni.pdf
El objetivo principal del inventario de seguridad es eliminar la probabilidad de un desabastecimiento debido a un recuento de inventario erróneo o a la variabilidad de la demanda durante el tiempo de entrega, lo que protege a la empresa de una disminución repentina de la demanda.
1) Explicar qu� es la gesti�n de la capacidad y por qu� es estrat�gi.pdf
1) Explicar qu es la gestin de la capacidad y por qu es estratgicamente importante.
2) La planificacin de capacidad generalmente se ve en tres duraciones de tiempo. Haz una lista
de ellos y elabora la definicin de cada uno..
1) En una poblaci�n que est� en equilibrio de Hardy-Weinberg, hay do.pdf
1) En una poblacin que est en equilibrio de Hardy-Weinberg, hay dos alelos posibles para un
determinado gen, A y a. Si la frecuencia del alelo A es 0,4. Qu pasa con la poblacin
heterocigota?
A 0,40
B 0,60
C 0,16
D 0,48
2) Longitud del pico en pinzones
En cierta poblacin de pinzones, un solo gen controla la longitud del pico. Hay dos alelos
posibles: S, que conduce a un pico corto, y L, que conduce a un pico largo. Los individuos con el
genotipo SS tendrn un pico corto, los individuos con el genotipo LL tendrn un pico largo y los
individuos con el genotipo SL tendrn un pico de longitud media. Los cientficos miden que en
esta poblacin de 1128 aves en total, 321 aves tienen picos cortos, 562 tienen picos de longitud
media y 245 tienen picos largos.
Diez aos despus, se repiten las mediciones. Esta vez, haba 1.346 aves en la poblacin. 452 tienen
picos cortos, 699 tienen picos de longitud media y 195 tienen picos largos.
Con base en los datos originales recopilados de la poblacin de 1128 aves, qu fraccin de la
poblacin se esperara que tuviera el genotipo SS si la poblacin estuviera en equilibrio de Hardy-
Weinberg?
a) 0.466
segundo) 0.534
c) 0.285
d) 0,217
3) Longitud del pico en pinzones
En cierta poblacin de pinzones, un solo gen controla la longitud del pico. Hay dos alelos
posibles: S, que conduce a un pico corto, y L, que conduce a un pico largo. Los individuos con el
genotipo SS tendrn un pico corto, los individuos con el genotipo LL tendrn un pico largo y los
individuos con el genotipo SL tendrn un pico de longitud media. Los cientficos miden que en
esta poblacin de 1128 aves en total, 321 aves tienen picos cortos, 562 tienen picos de longitud
media y 245 tienen picos largos.
Diez aos despus, se repiten las mediciones. Esta vez, haba 1.346 aves en la poblacin. 452 tienen
picos cortos, 699 tienen picos de longitud media y 195 tienen picos largos.
Segn los datos recopilados 10 aos despus, est evolucionando actualmente esta poblacin de
pinzones? Cmo lo sabes?
a) s porque ms individuos en la poblacin exhiben el genotipo SS de lo que se esperara si la
poblacin estuviera en equilibrio de Hardy-Weinberg
b) no porque el nmero de individuos que exhiben el genotipo SL coincide con lo que se esperara
si la poblacin estuviera en equilibrio de Hardy-Weinberg
c) no porque hay menos individuos en la poblacin que exhiben el genotipo SS de lo que se
esperara si la poblacin estuviera en equilibrio de Hardy-Weinberg
d) s porque hay ms individuos en la poblacin que exhiben el genotipo LL de lo que se esperara si
la poblacin estuviera en equilibrio de Hardy-Weinberg.
4) Suponga que en una pequea isla frente a la costa de Escocia, el 32 por ciento de la poblacin
tiene ojos azules, lo que significa que estos individuos deben ser homocigotos para el gen del
color de ojos azules (bb). El nico otro color de ojos que se encuentra en la isla es el marrn, y las
personas que son homocigotas para el gen del color de ojos marrn (BB) o heterocigotas (Bb)
tendrn ojos marrone.
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de Head Start en la iglesia. Te enteras de lo siguiente:
2) Desea probar la validez de un cuestionario que dise para su uso con pacientes con VIH que
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