This document contains practice questions on cell biology.
Question 1 asks about large biomolecules including glycogen, cellulose, polypeptides, and phospholipids. Part c asks for an element found in polypeptides but not the others, and parts c and d ask about parts and functions of phospholipid and protein cell membranes.
Question 2 shows amino acids forming a dipeptide through a condensation reaction using peptide bonds.
Question 3 is a table comparing starch, maltose and glycogen. Question 4 shows maltose hydrolysis and a test to distinguish sucrose from glucose.
Question 5 identifies an organic compound group and differences within it. Part b compares protein and glycogen diversity.
This document contains a series of multiple choice questions related to business, economics, and management. Specifically, it tests knowledge on topics like the objectives of the CSME, subsidies, privatization, organizational structures, and accounting/finance concepts. It contains 40 total multiple choice questions with options A-D for each question. The questions cover a wide range of business and management topics.
The document summarizes data collected on mobile signal strength for LIME and Digicel networks in the area of Vide-Bouteille, St. Lucia. 15 random areas were selected to measure signal strength using LIME and Digicel phones. For each area, 10 readings were taken and the mean calculated. The data shows most LIME customers received average to good reception, with a few areas of excellent or poor reception. Statistical analysis of the LIME data, including measures of central tendency, variance, and standard deviation, was performed. A similar process was followed to collect and analyze data for the Digicel network. The results will be used to test which provider has better overall coverage in the area using hypothesis
CAPE Chemstry 2012 U1 P2 Q1 Past Paper Answer And ExplanationsDenison Dwarkah
1) A dative covalent bond is one where one atom supplies both electrons to form the bond. It is shown as A→B and has the electron pair donated in the direction of the arrow. Ammonium ion NH4+ forms when ammonia NH3 bonds with H+ via a dative covalent bond where NH3 supplies the electrons.
2) Neutral polar molecules experience dipole-dipole forces from electrical interactions between their dipoles. The stronger the dipole moments and polarity, the stronger the interactions as seen in butane and propanone which have the same mass but propanone boils higher due to being polar.
3) Alcohols have higher boiling points than
This document contains 18 figures that summarize key concepts about photosynthesis. Photosynthesis is the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce oxygen and energy-storing sugars. It is the foundation for almost all life on Earth as it produces the oxygen and food that organisms need. The figures outline the light-dependent reactions where ATP and NADPH are produced to fuel the Calvin cycle reactions that incorporate carbon into organic molecules like glucose. Photosynthesis occurs in chloroplasts in plant cells and involves the absorption of light by chlorophyll and transfer of electrons and protons.
This document is meant to be used as a guide to current and upcoming students at the CXC CSEC level experiencing difficulty in doing their School Bases Assesment (SBA). This document follows the 2010 syllabus which may be subject to change.
This experiment aims to identify alkanes and alkenes by their reactions with different substances and determine their properties. Cyclohexane and cyclohexene are used as representative alkanes and alkenes, respectively. A series of tests are conducted including bromine, potassium permanganate, sulfuric acid and sodium hydroxide tests. The results show that cyclohexene is more reactive than cyclohexane due to the presence of a carbon-carbon double bond, undergoing addition reactions, while cyclohexane only undergoes substitution reactions. This supports the hypothesis that alkenes are much more reactive than alkanes.
This document outlines the requirements for a communication studies portfolio consisting of written and oral components. The oral component involves social research and a 6-8 minute expository presentation discussing the research. The presentation should include an introduction, body, evaluation of sources, and conclusion. It will be assessed based on discussion of issues, evaluation of sources, organization, and delivery. The written component contains a general introduction, 800-word reflective piece in a literary genre related to the theme, and a 350-word analysis of the reflective piece discussing registers, dialects, communication, and language attitudes.
This document contains a series of multiple choice questions related to business, economics, and management. Specifically, it tests knowledge on topics like the objectives of the CSME, subsidies, privatization, organizational structures, and accounting/finance concepts. It contains 40 total multiple choice questions with options A-D for each question. The questions cover a wide range of business and management topics.
The document summarizes data collected on mobile signal strength for LIME and Digicel networks in the area of Vide-Bouteille, St. Lucia. 15 random areas were selected to measure signal strength using LIME and Digicel phones. For each area, 10 readings were taken and the mean calculated. The data shows most LIME customers received average to good reception, with a few areas of excellent or poor reception. Statistical analysis of the LIME data, including measures of central tendency, variance, and standard deviation, was performed. A similar process was followed to collect and analyze data for the Digicel network. The results will be used to test which provider has better overall coverage in the area using hypothesis
CAPE Chemstry 2012 U1 P2 Q1 Past Paper Answer And ExplanationsDenison Dwarkah
1) A dative covalent bond is one where one atom supplies both electrons to form the bond. It is shown as A→B and has the electron pair donated in the direction of the arrow. Ammonium ion NH4+ forms when ammonia NH3 bonds with H+ via a dative covalent bond where NH3 supplies the electrons.
2) Neutral polar molecules experience dipole-dipole forces from electrical interactions between their dipoles. The stronger the dipole moments and polarity, the stronger the interactions as seen in butane and propanone which have the same mass but propanone boils higher due to being polar.
3) Alcohols have higher boiling points than
This document contains 18 figures that summarize key concepts about photosynthesis. Photosynthesis is the process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to produce oxygen and energy-storing sugars. It is the foundation for almost all life on Earth as it produces the oxygen and food that organisms need. The figures outline the light-dependent reactions where ATP and NADPH are produced to fuel the Calvin cycle reactions that incorporate carbon into organic molecules like glucose. Photosynthesis occurs in chloroplasts in plant cells and involves the absorption of light by chlorophyll and transfer of electrons and protons.
This document is meant to be used as a guide to current and upcoming students at the CXC CSEC level experiencing difficulty in doing their School Bases Assesment (SBA). This document follows the 2010 syllabus which may be subject to change.
This experiment aims to identify alkanes and alkenes by their reactions with different substances and determine their properties. Cyclohexane and cyclohexene are used as representative alkanes and alkenes, respectively. A series of tests are conducted including bromine, potassium permanganate, sulfuric acid and sodium hydroxide tests. The results show that cyclohexene is more reactive than cyclohexane due to the presence of a carbon-carbon double bond, undergoing addition reactions, while cyclohexane only undergoes substitution reactions. This supports the hypothesis that alkenes are much more reactive than alkanes.
This document outlines the requirements for a communication studies portfolio consisting of written and oral components. The oral component involves social research and a 6-8 minute expository presentation discussing the research. The presentation should include an introduction, body, evaluation of sources, and conclusion. It will be assessed based on discussion of issues, evaluation of sources, organization, and delivery. The written component contains a general introduction, 800-word reflective piece in a literary genre related to the theme, and a 350-word analysis of the reflective piece discussing registers, dialects, communication, and language attitudes.
For everyone who doesn't understand to do their SBA within the Caribbean has a sample (as shown above) to complete their SBA with a stunning remarks. Enjoy
Cape biology uni 2 -_ecosystems_population_ecology_and_practical_methods_of_e...Hilton Ritch
This document discusses methods for estimating population sizes and distributions in ecology. It explains that directly counting all individuals in a population is often impossible, so sampling techniques are used instead to estimate population parameters. Common sampling methods described include quadrat sampling, transect sampling, and mark-release-recapture. Factors that influence the accuracy of population estimates, such as sample size and randomization, are also discussed.
Flowering plants reproduce sexually through a process influenced by environmental factors. Flowering involves a change in gene expression that causes shoot meristems to produce flowers. Pollination, fertilization, and seed dispersal must then occur for reproduction to be successful. Many plants use mutualistic relationships with pollinators to facilitate pollination and reproduction. The timing of flowering is triggered in response to environmental cues like day length in many species.
IB Biology 1.2 Slides: Ultrastructure of CellsJacob Cedarbaum
Electron microscopes have much higher resolution than light microscopes due to the shorter wavelengths of electron beams. Prokaryotes like E. coli have a simple cell structure without compartments, containing a cell wall, plasma membrane, ribosomes, nucleoid, cytoplasm and other structures. They divide via binary fission. Eukaryotes have a compartmentalized cell structure containing organelles like the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles. Organelles in specialized cells like pancreatic and leaf cells are adapted for their functions like enzyme secretion and photosynthesis.
1) This document provides guidance for writing a portfolio reflection that analyzes two elements of language.
2) It outlines the sections to include: preface, introduction, analysis, and reflection.
3) The analysis section asks the writer to comment on two of the following forms of language: register, dialectal variation, attitude to language, or communicative behavior.
The document summarizes a research study on the causes of teenage pregnancy in Lowmans, St. Vincent and the Grenadines. It presents findings from questionnaires distributed to residents which showed that peer pressure and curiosity were the main reasons cited for teenage pregnancy. The majority of respondents believed teenage pregnancy was most common between ages 15-17. The study concluded that peer pressure and poverty were the two main causes of teenage pregnancy in the area. It provided recommendations such as increased parental guidance, sex education programs, and activities for teenagers.
Some sociologists claim that human behavior is determined by socialization. Socialization is the process by which people, from birth, learn behaviors by observing and interacting with others. It shapes how individuals are influenced and act. For children ages 0-10 especially, natural socialization during play is important for their development as they learn and adjust to their surrounding society. It will be difficult to change a child's behaviors after age 10 if they have not gone through this early learning stage. Feral children who have no human contact or care before age 10 may not be able to learn typical social behaviors even after being introduced to human society later. The anticipatory stage aims to change feral children's attitudes and actions to be more like those with
CSEC Physics Lab - Factors affecting period of a pendulumRonaldo Degazon
This experiment investigated factors that affect the period of a pendulum. It was found that the length of the string affected the period, with longer strings resulting in longer periods. Specifically, doubling the length of the string doubled the period. The mass of the pendulum did not affect the period. Finally, the angle of the pendulum swing was found to not significantly impact the period either.
The Internet has grown rapidly over the past decade and changed global communication through new media like social networks. It has impacted newspapers by decreasing their size and numbers worldwide as people get news online. Libraries have transitioned to virtual environments through digitization of resources, allowing global access but also requiring new strategies for organizing information. While educational technology can expand children's knowledge, it also risks internet addiction negatively impacting teenagers' social skills if overused as a replacement for personal interactions.
This document summarizes two biology lab reports by a student. The first lab involved classifying 10 organisms found around the student's school into their scientific kingdoms, phyla, and classes. The second lab investigated interdependence between organisms by constructing food chains and a food web of 10 organisms and their food sources. Key findings were that organisms can be classified into taxonomic groups and that living things rely on each other through predator-prey relationships and the transfer of energy up the food chain from producers to consumers.
CAPE Communication Studies IA
Please note that the example of Language/Dialectal Variation used in the Expository piece is "Jamaican Creole" and may not be a suitable example for other countries. Thank you.
The document discusses how technology has negatively impacted human interaction and well-being. It notes that people now socialize 30 minutes per day on average compared to more frequent offline socializing in the past. Charts show time spent on social media and mobile devices has increased to almost half the day. The document outlines ways technology affects mental and physical health, education, and children. It advocates setting limits on technology and using it in beneficial ways, while focusing on socializing offline and physical activity to maintain well-being.
The group faced two main issues during their assignment. First, there was a lack of critical analysis during research due to dividing work and not commenting on each other's parts. They proposed adopting a facilitative leadership model to promote critical thinking. Second, decision making was unsystematic with interruptions, due to being overly polite. They proposed using brainstorming to systematically involve members and allow for constructive conflict. Overall, the experience highlighted the importance of systematic critical thinking and debate within groups to achieve quality work.
This document contains practice questions on various biology topics. Regarding cell structures: phospholipids contain fatty acid chains (A) and phosphate groups (C); chloroplasts and mitochondria share double membranes and both perform cellular respiration. Transport across membranes can occur via passive diffusion, facilitated diffusion or active transport using ATP. Proteins in membranes help with cell identification and movement of substances.
This document contains a 28 question multiple choice exam about organic chemistry concepts. The questions cover topics like elements found in living organisms, atomic structure of molybdenum isotopes, identifying functional groups in molecules, properties of carbohydrates and lipids, and peptide bond hydrolysis. The key provided indicates the correct answer for each question is A, B, C, D, E, etc. respectively.
Nucleic acids are polymers made up of nucleotide monomers. The differences between RNA and DNA include RNA containing ribose with an OH group, while DNA contains deoxyribose. Hydrogen bonds form between complementary bases on two DNA strands. During mRNA processing, introns are removed and exons are joined to form mature mRNA. Nucleic acids and proteins consist of repeating units linked by phosphodiester bonds in the backbone.
This document contains 20 multiple choice questions about biomolecules such as proteins, nucleic acids, lipids, and carbohydrates. The questions test understanding of topics like protein folding, types of bonds in biomolecules, enzyme structure and function, and the roles of major elements in living systems. The document provides explanations for the answers to help students learn about key concepts in biochemistry.
For everyone who doesn't understand to do their SBA within the Caribbean has a sample (as shown above) to complete their SBA with a stunning remarks. Enjoy
Cape biology uni 2 -_ecosystems_population_ecology_and_practical_methods_of_e...Hilton Ritch
This document discusses methods for estimating population sizes and distributions in ecology. It explains that directly counting all individuals in a population is often impossible, so sampling techniques are used instead to estimate population parameters. Common sampling methods described include quadrat sampling, transect sampling, and mark-release-recapture. Factors that influence the accuracy of population estimates, such as sample size and randomization, are also discussed.
Flowering plants reproduce sexually through a process influenced by environmental factors. Flowering involves a change in gene expression that causes shoot meristems to produce flowers. Pollination, fertilization, and seed dispersal must then occur for reproduction to be successful. Many plants use mutualistic relationships with pollinators to facilitate pollination and reproduction. The timing of flowering is triggered in response to environmental cues like day length in many species.
IB Biology 1.2 Slides: Ultrastructure of CellsJacob Cedarbaum
Electron microscopes have much higher resolution than light microscopes due to the shorter wavelengths of electron beams. Prokaryotes like E. coli have a simple cell structure without compartments, containing a cell wall, plasma membrane, ribosomes, nucleoid, cytoplasm and other structures. They divide via binary fission. Eukaryotes have a compartmentalized cell structure containing organelles like the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and vacuoles. Organelles in specialized cells like pancreatic and leaf cells are adapted for their functions like enzyme secretion and photosynthesis.
1) This document provides guidance for writing a portfolio reflection that analyzes two elements of language.
2) It outlines the sections to include: preface, introduction, analysis, and reflection.
3) The analysis section asks the writer to comment on two of the following forms of language: register, dialectal variation, attitude to language, or communicative behavior.
The document summarizes a research study on the causes of teenage pregnancy in Lowmans, St. Vincent and the Grenadines. It presents findings from questionnaires distributed to residents which showed that peer pressure and curiosity were the main reasons cited for teenage pregnancy. The majority of respondents believed teenage pregnancy was most common between ages 15-17. The study concluded that peer pressure and poverty were the two main causes of teenage pregnancy in the area. It provided recommendations such as increased parental guidance, sex education programs, and activities for teenagers.
Some sociologists claim that human behavior is determined by socialization. Socialization is the process by which people, from birth, learn behaviors by observing and interacting with others. It shapes how individuals are influenced and act. For children ages 0-10 especially, natural socialization during play is important for their development as they learn and adjust to their surrounding society. It will be difficult to change a child's behaviors after age 10 if they have not gone through this early learning stage. Feral children who have no human contact or care before age 10 may not be able to learn typical social behaviors even after being introduced to human society later. The anticipatory stage aims to change feral children's attitudes and actions to be more like those with
CSEC Physics Lab - Factors affecting period of a pendulumRonaldo Degazon
This experiment investigated factors that affect the period of a pendulum. It was found that the length of the string affected the period, with longer strings resulting in longer periods. Specifically, doubling the length of the string doubled the period. The mass of the pendulum did not affect the period. Finally, the angle of the pendulum swing was found to not significantly impact the period either.
The Internet has grown rapidly over the past decade and changed global communication through new media like social networks. It has impacted newspapers by decreasing their size and numbers worldwide as people get news online. Libraries have transitioned to virtual environments through digitization of resources, allowing global access but also requiring new strategies for organizing information. While educational technology can expand children's knowledge, it also risks internet addiction negatively impacting teenagers' social skills if overused as a replacement for personal interactions.
This document summarizes two biology lab reports by a student. The first lab involved classifying 10 organisms found around the student's school into their scientific kingdoms, phyla, and classes. The second lab investigated interdependence between organisms by constructing food chains and a food web of 10 organisms and their food sources. Key findings were that organisms can be classified into taxonomic groups and that living things rely on each other through predator-prey relationships and the transfer of energy up the food chain from producers to consumers.
CAPE Communication Studies IA
Please note that the example of Language/Dialectal Variation used in the Expository piece is "Jamaican Creole" and may not be a suitable example for other countries. Thank you.
The document discusses how technology has negatively impacted human interaction and well-being. It notes that people now socialize 30 minutes per day on average compared to more frequent offline socializing in the past. Charts show time spent on social media and mobile devices has increased to almost half the day. The document outlines ways technology affects mental and physical health, education, and children. It advocates setting limits on technology and using it in beneficial ways, while focusing on socializing offline and physical activity to maintain well-being.
The group faced two main issues during their assignment. First, there was a lack of critical analysis during research due to dividing work and not commenting on each other's parts. They proposed adopting a facilitative leadership model to promote critical thinking. Second, decision making was unsystematic with interruptions, due to being overly polite. They proposed using brainstorming to systematically involve members and allow for constructive conflict. Overall, the experience highlighted the importance of systematic critical thinking and debate within groups to achieve quality work.
This document contains practice questions on various biology topics. Regarding cell structures: phospholipids contain fatty acid chains (A) and phosphate groups (C); chloroplasts and mitochondria share double membranes and both perform cellular respiration. Transport across membranes can occur via passive diffusion, facilitated diffusion or active transport using ATP. Proteins in membranes help with cell identification and movement of substances.
This document contains a 28 question multiple choice exam about organic chemistry concepts. The questions cover topics like elements found in living organisms, atomic structure of molybdenum isotopes, identifying functional groups in molecules, properties of carbohydrates and lipids, and peptide bond hydrolysis. The key provided indicates the correct answer for each question is A, B, C, D, E, etc. respectively.
Nucleic acids are polymers made up of nucleotide monomers. The differences between RNA and DNA include RNA containing ribose with an OH group, while DNA contains deoxyribose. Hydrogen bonds form between complementary bases on two DNA strands. During mRNA processing, introns are removed and exons are joined to form mature mRNA. Nucleic acids and proteins consist of repeating units linked by phosphodiester bonds in the backbone.
This document contains 20 multiple choice questions about biomolecules such as proteins, nucleic acids, lipids, and carbohydrates. The questions test understanding of topics like protein folding, types of bonds in biomolecules, enzyme structure and function, and the roles of major elements in living systems. The document provides explanations for the answers to help students learn about key concepts in biochemistry.
This document is an organic chemistry homework assignment on macromolecules. It contains multiple choice and free response questions testing understanding of key macromolecule concepts like polymers, proteins, lipids and their structures. Questions cover topics such as monomer and polymer examples from food and common materials, types of polymerization, and properties of specific polymers like nylon and polypropylene.
1. The document provides information about biomolecules including carbohydrates, proteins, lipids and enzymes.
2. It discusses the building blocks of life, classes of biomolecules, and examples of important biomolecules like phospholipids.
3. Key concepts covered include enzyme classification and properties, protein structure, and the roles of biomolecules like lipids in biological processes.
This document provides a set of practice problems for a biology chapter on organic molecules and their properties. The problems address topics like carbon's versatility in forming compounds, isomers, functional groups, and polarity. Answers are provided at the bottom.
This document is a biology final exam for Mrs. Glemaud's class in 2010-2011. It contains 60 multiple choice questions testing students' knowledge of key biology concepts across several units, including cell structure and function, cellular respiration, photosynthesis, genetics, and mitosis. The questions cover topics such as the parts of the cell, organelle functions, energy production in cells, the cell cycle, Mendelian genetics, and inheritance patterns.
This document is a biology final exam for Mrs. Glemaud's class in 2010-2011. It contains 60 multiple choice questions testing students' knowledge of key biology concepts across several units, including cell structure and function, cellular respiration, photosynthesis, genetics, and mitosis. The questions cover topics such as the parts of the cell, organelle functions, energy production in cells, the cell cycle, Mendelian genetics, and inheritance of traits.
1. This document contains a 31 question biochemistry final exam covering topics like DNA sequencing, tRNA, fatty acids, lipid anchors, and cell signaling pathways.
2. Questions test knowledge of specific biochemical concepts like how deamination of cytosine produces uracil, the purpose of chemically modified siRNAs, and challenges of RNAi therapy delivery.
3. Signaling topics include G protein coupled receptors, receptor tyrosine kinases, JAK-STAT pathway, and termination of signaling cascades by receptor desensitization and phosphatases.
IB Biology Standard 2.4 Proteins LectureHill Sharon
Amino acids are linked together through condensation reactions to form polypeptides. There are 20 different amino acids that make up most proteins, which are coded for by genes and linked in varying sequences. The amino acid sequence determines a protein's three-dimensional structure and function. Proteins perform a wide variety of roles in cells and organisms, such as catalyzing reactions, providing structure, transporting molecules, and more. Environmental factors like heat and changes in pH can cause proteins to denature and lose their structure.
Photosynthesis - Most Impotant MCQs.pdfDrAmanAgarwal
1. Photosynthesis is a chemical process that uses light energy to convert carbon dioxide and water into oxygen and organic compounds like glucose.
2. It is important because it provides food and oxygen and removes carbon dioxide from the atmosphere.
3. The half leaf experiment proved that light is essential for photosynthesis.
Biology 10 nal paper 1&2 chemestry of life cell division mar 12Galaxia Mercury
The document provides instructions and content for a biology exam consisting of two papers to be taken on March 15, 2012. Paper I contains 20 multiple choice questions testing concepts in biology. Paper II contains 8 questions in various formats assessing topics such as DNA structure and replication, protein synthesis, and cell division. Students are instructed to answer all questions in the spaces provided using pen only and clear handwriting. The document also provides the scoring rubrics for each paper based on the total number of points earned.
This document contains multiple choice and short answer questions about lipids from Chapter 10. It covers several key topics:
- Structural lipids like glycerophospholipids and sphingolipids that are components of cell membranes. Questions define the structures of phosphatidylcholine, sphingomyelin, and cerebrosides.
- Storage lipids like triacylglycerols that are used to store fatty acids for energy. Questions describe the functions of triglycerides in mammals and plants.
- Fatty acid structure and how double bonds and chain length affect melting point.
- Lipids that serve as signals, cofactors, and pigments like prostaglandins, vitamin
This document contains 25 questions assessing knowledge of key concepts in biology including:
1) The structure of DNA and how base substitution mutations can cause diseases like sickle cell anemia.
2) The production of dipeptides via condensation reactions and the role of condensation and hydrolysis in amino acid and dipeptide relationships.
3) Processes of translation, aerobic respiration including oxidative phosphorylation, and effects of temperature, pH and substrate concentration on enzyme activity.
This document contains a 25-question exam on biology topics including cell division, enzymes, and membranes. The exam consists of two sections - Section A with 25 multiple choice questions worth 1-5 marks each, and Section B with 3 short answer questions worth 30 marks total. The questions cover topics such as the stages of mitosis, enzyme structure and function, cellular transport mechanisms, and meiosis.
HSB Multiplechoice Questions (CSEC 2016)Joemar James
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.
Class 11 Important Questions for Biology - Biochemistry of CellInfomatica Academy
Here you can get Class 11 Important Questions for Biology based on NCERT Textbook for Class XI. Biology Class 11 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Biochemistry of a cell for Class 11 Biology subject.
Lehninger principles of biochemistry 7th edition nelson test banksolahar
This document provides a test bank with 50 multiple choice questions related to Lehninger Principles of Biochemistry 7th Edition by Nelson. It can be purchased from the efilespro website for instant download. Contact information and links are provided to purchase the test bank or get support from the company.
Similar to Practise questions unit_1_module_1 (20)
Lehninger principles of biochemistry 7th edition nelson test bank
Practise questions unit_1_module_1
1. PRACTISE QUESTIONS – UNIT 1 MODULE 1
1. Glycogen, cellulose, polypeptides and phospholipids all have large molecules.
(a) Which of these molecules is
(i) not found in a plant cell;
(1)
(ii) used primarily as a structural molecule?
(1)
Give one element found in polypeptides that is not present in those of
(b)
glycogen, cellulose or phospholipids.
(1)
The diagram represents a phospholipid molecule
(c) Name the following parts of the molecule
(i) A
(1)
(ii) B
(1)
(iii) C
(1)
Phospholipids are found in cell membranes. Proteins are also found in cell
(d)
membranes, give two functions of proteins in cell membranes
(2)
2. 2. The diagram below shows two amino acids
+
a Draw the result of these two amino acids forming a dipeptide
(2)
b Name the chemical reaction used to form the dipeptide
(1)
c Name the type of bond which links the two amino acids in the dipeptide
(1)
d State what the R shown in the amino acid diagrams refers to
(1)
e Describe how you perform a biochemical test to identify proteins
(2)
3. 3. a Complete the table below by responding to each statement
Statement Starch Maltose Glycogen
Is a polymer of glucose
Contains glycosidic bonds
Can act as an energy store in
plant cells
Is a disaccharide
(4)
b Describe how you would perform a test to check for the presence of
starch
(2)
4. 4. The diagram below shows a molecule of maltose.
This molecule can be broken into two glucose molecules by a chemical reaction
(a) (i) What type of reaction would this be
(1)
(ii) What substance would need to be added for this reaction to proceed
(1)
Draw below one of the glucose molecules that would be formed by this
(iii)
reaction
(1)
Describe how you would perform a test to indicate that a substance
(b)
contained sucrose and not glucose
(4)
5. 5. a) The diagram shows the formula of a molecule of an organic compound
(i) To which group of organic compounds does this molecule belong?
(1)
Give one way in which this molecule differs from other compounds in the
(ii)
group.
(1)
(b) The table shows some of the organic compounds found in a bacterial cell.
% OF NUMBER OF
COMPOUND TOTAL DIFFERENT TYPES
DRY MASS OF MOLECULE
Protein 55.0 1050
DNA 3.1 1
Lipid 9.1 4
Glycogen 2.5 1
Glycogen and protein are both polymers. Explain why there can only be one
type of glycogen molecule, but there can be many types of protein.
(2)
6. 1. How an atom behaves when it comes into contact with other atoms is
determined by its
a. nucleus.
b. size.
c. protons.
d. neutrons.
e. electrons.
2. Cellulose is a _____ made of many _____.
a. polypeptide . . . monomers
b. carbohydrate . . . fatty acids
c. polymer . . . glucose molecules
d. protein . . . amino acids
e. lipid . . . triglycerides
3. In a hydrolysis reaction, _____, and in this process water is _____ .
a. a polymer breaks up to form monomers . . . consumed
b. a monomer breaks up to form polymers . . . produced
c. monomers are assembled to produce a polymer . . . consumed
d. monomers are assembled to produce a polymer . . . produced
e. a polymer breaks up to form monomers . . . produced
4. The four main categories of macromolecules in a cell are
a. proteins, DNA, RNA, and steroids.
b. monosaccharides, lipids, polysaccharides, and proteins.
c. proteins, nucleic acids, carbohydrates, and lipids.
d. nucleic acids, carbohydrates, monosaccharides, and proteins.
e. RNA, DNA, proteins, and carbohydrates.
5. The characteristic that all lipids have in common is
a. they are all made of fatty acids and glycerol.
b. they all contain nitrogen.
c. none of them is very high in energy content.
d. they are all acidic when mixed with water.
7. e. none of them dissolves in water.
6. The overall three-dimensional shape of a polypeptide is called the
a. double helix.
b. primary structure.
c. secondary structure.
d. tertiary structure.
e. quaternary structure.
7. Which of the following do polysaccharides and proteins have in
common?
a. They are both made of amino acids.
b. Their structures contain sugars.
c. They are hydrophobic.
d. They are large polymers.
e. They each consist of four basic kinds of subunits.
8. A glucose molecule is to starch as
a. a steroid is to a lipid.
b. an amino acid is to a protein.
c. a nucleic acid is to a polypeptide.
d. a fat is to glycerol.
e. an amino acid is to a nucleic acid.
9. Which of the following ranks the molecules in the correct order by
size?
a. water . . . sucrose . . . glucose . . . protein
b. protein . . . water . . . glucose . . . sucrose
c. water . . . protein . . . sucrose . . . glucose
d. protein . . . sucrose . . . glucose . . . water
e. glucose . . . water . . . sucrose . . . protein
10. Lipids differ from other large biological molecules in that they
a. are much larger.
b. are not truly polymers.
c. do not have specific shapes.
d. do not contain carbon.
8. e. contain nitrogen atoms.
1. The diagram below shows the structure of a chloroplast.
a. Name the process that occurs in chloroplasts
(1)
b Name the structures labeled.
(i) X.
(1)
(ii) Y
(1)
c Give two similarities in structure between chloroplasts and mitochondria.
(2)
Some scientists think that chloroplasts and mitochondria have evolved from
d
intracellular symbiotic bacteria. Explain why
the structures of mitochondria and chloroplasts can account for this
hypothesis.
9. 2. a Complete the following table with ticks and crosses
Facilitated Active
Osmosis
Diffusion Transport
From High to Low concentration
Requires ATP
Transport through intrinsic membrane
proteins
Can be controlled by cell
(4)
b Describe a cell capable of taking up glucose (a monosaccharide) by active
transport may be incapable of taking up fructose (another monosaccharide) by
active transport
Multiple choice Cells questions
1. To enter or leave a cell, substances must pass through
a. a microtubule.
b. the Golgi apparatus.
c. a ribosome.
d. the nucleus.
e. the plasma membrane.
2. Bacterial cell are prokaryotic; in comparison to a typical eukaryotic cell they
would
a. be smaller.
b. have a smaller nucleus.
c. lack a plasma membrane.
d. have fewer internal membranous compartments.
e. have a greater variety of organelles.
3. You would expect a cell with an extensive Golgi apparatus to
a. make a lot of ATP.
b. secrete a lot of material.
c. move actively.
d. perform photosynthesis.
10. e. store large quantities of food
4. Which of the following correctly matches an organelle with its function?
a. mitochondrion . . . photosynthesis
b. nucleus . . . cellular respiration
c. ribosome . . . manufacture of lipids
d. lysosome . . . movement
e. central vacuole . . . storage
5. Of the following organelles, which group is involved in manufacturing
substances needed by the cell?
a. lysosome, vacuole, ribosome
b. ribosome, rough ER, smooth ER
c. vacuole, rough ER, smooth ER
d. smooth ER, ribosome, vacuole
e. rough ER, lysosome, vacuole
6. A cell has mitochondria, ribosomes, smooth and rough ER, and other parts.
Based on this information, it could not be
a. a cell from a pine tree.
b. a grasshopper cell.
c. a yeast (fungus) cell.
d. a bacterium.
e. Actually, it could be any of the above.
7. The electron microscope has been particularly useful in studying bacteria,
because
a. electrons can penetrate tough bacterial cell walls.
b. bacteria are so small.
c. bacteria move so quickly they are hard to photograph.
d. with few organelles present, bacteria are distinguished by differences
in individual macromolecules.
e. their organelles are small and tightly packed together
11. 8. Cell fractionation is the most appropriate procedure for preparing ____ for
study.
a. isolated cells which are normally found tightly attached to
neighbouring cells
b. cells without a functional cytoskeleton
c. isolated organelles
d. the basic macromolecules
e. bone and other similar cells which are situated within a mineral
framework
9. Which of the following clues would tell you whether a cell is prokaryotic or
eukaryotic?
a. the presence or absence of a rigid cell wall
b. whether or not the cell is partitioned by internal membranes
c. the presence or absence of ribosomes
d. whether or not the cell carries out cellular metabolism
e. whether or not the cell contains DNA
10. Sara would like to film the movement of chromosomes during cell division.
Her best choice for a microscope would be a
a. light microscope, because of its resolving power.
b. transmission electron microscope, because of its magnifying power.
c. scanning electron microscope, because the specimen is alive.
d. transmission electron microscope, because of its great resolving
power.
e. light microscope, because the specimen is alive.
12. 1. The micrograph below of a fish's gill clearly shows the secondary lamellae
arranged at 90degrees to the gill filaments
a i Using information from the micrograph explain why the structure of the gills
make them efficient at exchanging gases between blood and water
(4)
ii The flow of blood and water through the secondary lamellae is often described
as countercurrent. Explain the significance of this in relation to gas exchange
(2)
b Name the structure labelled X in the diagram below
13. 1. The diagram below shows the rate of an enzyme controled
reaction. The solid line indicates the normal relationship
between rate and substrate concentration and the dotted line
indicates the relationship when a competitive inhibitor is
added.
a.i) Explain how a competitive inhibitor acts
(2)
Explain why in the graph above the inhibitor is a competitive
ii)
inhibitor?
(2)
The graph below shows the relationship between rate of reaction and
temperature of most enzyme reaction.
b. Explain why the relationship is that shown on the graph.
(5)
14. 2. Read through the following passage and then decide which
words should be placed in the gaps.
Enzymes are globular proteins which act as biological catalysts.
They are able to temporarily bind with substrate molecules due
to an region know as the_____________________. Because
enzymes are proteins their activity can be affected by pH and
___________________. The catalytic ability of enzymes
a
depends on their three dimensional shape, this is more
commonly refered to as the enzymes __________ structure.
During an enzyme catalysed reaction a transition occurs during
which the reactants are referred to as the
______________________.