This biology study guide covers topics related to biological organization, cells, and basic chemistry concepts. It contains 26 multiple choice questions that assess understanding of: 1) biological hierarchy from least to most complex, 2) examples of organelles, 3) correct representation of biological hierarchy, 4) differences between prokaryotic and eukaryotic cells, 5) enzymes as organic catalysts in cells, 6) common features of prokaryotic and eukaryotic cells, 7) the definition of a hypothesis, 8) features of a controlled experiment, 9) the importance of a control group in experiments, and 10) the primary reason for including a control group. The remaining questions cover essential elements, atomic structure, isotopes
Atoms and molecule, Structure of atom, Diversity in living living organisms, ...Harsh Singh
This document contains practice questions from lessons on atoms and molecules, structure of atoms, diversity in living organisms, why we fall ill, and natural resources. It includes 50 multiple choice questions across these topics from chemistry and biology, with the question followed by the answer. The questions test knowledge of concepts like atomic structure, chemical formulas, chloroplast structure in plants, infectious vs. non-infectious diseases, and ecosystem producers and consumers.
This worksheet will enable teachers to self assess in order to remain relevant and in line with the goal of transforming education into the 21st cenury. This worksheet was developed by the DepEd. I am making it available in my site with the sole goal of spreading information to the farthest corners of the nation.
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.
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.
This document contains a test bank with 30 multiple choice questions about chemistry concepts from Campbell Biology Chapter 2. It provides the questions, multiple choice answers, taxonomy level, and section for each question. It also includes links to websites selling full test banks and contact information for ordering test banks.
This document provides instructions and questions for a Biology for Engineers exam. It includes 9 total questions, with question 1 being compulsory and students to attempt any 5 of the remaining 8 questions. Question 1 involves choosing the correct option for 7 multiple choice questions. The other questions require explaining concepts such as scientific nomenclature, model organisms, protein structure, DNA structure, metabolism, enzyme function and inhibition. Students must provide detailed answers and diagrams for questions 8 and 9 regarding DNA replication and enzyme mechanisms.
General Chemistry MCQS By Malik Xufyan.pdfMalik Xufyan
This document contains 60 multiple choice questions about general chemistry concepts. The questions cover topics like the composition of matter, radioactive isotopes, electron discovery, chemical formulas, atomic structure, moles, gas laws, and organic chemistry. The document is a study guide for chemistry exams given by organizations like PPSC, FPSC, and KPPSC.
Atoms and molecule, Structure of atom, Diversity in living living organisms, ...Harsh Singh
This document contains practice questions from lessons on atoms and molecules, structure of atoms, diversity in living organisms, why we fall ill, and natural resources. It includes 50 multiple choice questions across these topics from chemistry and biology, with the question followed by the answer. The questions test knowledge of concepts like atomic structure, chemical formulas, chloroplast structure in plants, infectious vs. non-infectious diseases, and ecosystem producers and consumers.
This worksheet will enable teachers to self assess in order to remain relevant and in line with the goal of transforming education into the 21st cenury. This worksheet was developed by the DepEd. I am making it available in my site with the sole goal of spreading information to the farthest corners of the nation.
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.
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.
This document contains a test bank with 30 multiple choice questions about chemistry concepts from Campbell Biology Chapter 2. It provides the questions, multiple choice answers, taxonomy level, and section for each question. It also includes links to websites selling full test banks and contact information for ordering test banks.
This document provides instructions and questions for a Biology for Engineers exam. It includes 9 total questions, with question 1 being compulsory and students to attempt any 5 of the remaining 8 questions. Question 1 involves choosing the correct option for 7 multiple choice questions. The other questions require explaining concepts such as scientific nomenclature, model organisms, protein structure, DNA structure, metabolism, enzyme function and inhibition. Students must provide detailed answers and diagrams for questions 8 and 9 regarding DNA replication and enzyme mechanisms.
General Chemistry MCQS By Malik Xufyan.pdfMalik Xufyan
This document contains 60 multiple choice questions about general chemistry concepts. The questions cover topics like the composition of matter, radioactive isotopes, electron discovery, chemical formulas, atomic structure, moles, gas laws, and organic chemistry. The document is a study guide for chemistry exams given by organizations like PPSC, FPSC, and KPPSC.
BIO101 Midterm - Sacramento Valley Campus- June 2014TEST MName.docxhartrobert670
BIO101 Midterm - Sacramento Valley Campus- June 2014
TEST M
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Homologous chromosomes ______.
A) include only the autosomes
B) separate during interphase
C) include only the sex chromosomes
D) are a set of chromosomes that the cell received from one parent
E) carry the same genes
1)
2) Glucose molecules provide energy to power the swimming motion of sperm. In this example,
the sperm are changing ______.
A) kinetic energy into chemical energy
B) chemical energy into potential energy
C) kinetic energy into potential energy
D) chemical energy into kinetic energy
E) none of the above
2)
3) Examine the genetic code table, shown below. The codon AGC codes for the amino acid ______. 3)
1
A) serine
B) alanine
C) glycine
D) threonine
E) arginine
4) Hypophosphatemia (vitamin D-resistant rickets) is inherited as an sex-linked dominant trait.
The relevant gene is found on the X chromosome. What is the expected outcome of a cross
between a homozygous recessive woman and a man with hypophosphatemia?
A) Seventy-five percent of their offspring exhibit hypophosphatemia.
B) Twenty-five percent of their offspring exhibit hypophosphatemia.
C) Fifty percent of their daughters and fifty percent of their sons exhibit hypophosphatemia.
D) All of their daughters and none of their sons exhibit hypophosphatemia.
E) All of their sons and none of their daughters exhibit hypophosphatemia.
4)
Please read the following paragraph and answer the following question(s).
Amanda's parents realized that her body was not developing properly about the time she was 12 years old. She was
shorter than most of her friends and was not going through changes normally associated with female puberty. They took
her to a doctor who initially diagnosed Amanda with Turner Syndrome because of her physical features. He ordered a
karyotype that confirmed his diagnosis. Amanda was born with only one X chromosome. Although there is no specific
cure, the doctor was able to treat her and correct some of the problems associated with the condition. For example, she
received growth hormone to improve her growth and estrogen to help her develop the physical changes of puberty.
5) Amanda's abnormal number of sex chromosomes resulted from ______.
A) random fertilization
B) independent assortment of chromosomes
C) cytokinesis
D) nondisjunction
E) crossing over
5)
6) Speciation requires ______.
A) long periods of time
B) geographic isolation
C) periods of rapid evolutionary change
D) a mass extinction so that new environmental opportunities will be available to the
survivors
E) genetic isolation
6)
7) The ability to tolerate lactose throughout life is most likely to be seen in ______.
A) Native Americans
B) East Asian populations
C) populations that live in cold climates
D) cultures that keep dairy herds
E) populations that live in wet climates
7)
2
8) Which of the foll ...
Ch 31 Nuclear Physics and RadioactivityScott Thomas
This document provides an overview of key concepts in nuclear physics and radioactivity covered in Chapter 31, including:
1) Nuclear reactions such as conservation of mass number and charge in nuclear reactions. Mass-energy equivalence and how it relates to energy released in nuclear processes.
2) Properties of the nucleus including isotopes, mass number, and atomic number. The strong nuclear force that binds nucleons together.
3) Radioactive decay processes including alpha, beta, gamma decay and particle emissions. Applications of radioactivity such as smoke detectors and radiation therapy.
4) Additional topics covered are nuclear structure, binding energy, the mass defect, radioactive dating, and the neutrino. Learning objectives provide details on understanding these
This document provides 17 practice problems about chemistry concepts covered in Chapter 2 Part 1 of a Bio 110 textbook. The problems cover topics like the number of electrons in a single covalent bond, how changing neutrons creates isotopes, outer electron shells and ion formation, atom stability, common elements in living matter, similarities between elements in the same column, electron configuration of fluorine, drawing chlorine atoms, ion formation likelihood, bond polarity in methane and ammonia, bond type in sodium chloride, and using radioisotopes to trace substances in the body. Answers are provided at the bottom of the document.
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.
[Type text][Type text][Type text]BIOL 320 Final Exam BIO.docxhanneloremccaffery
[Type text] [Type text] [Type text]
BIOL 320 Final Exam
BIOL 320 Final Exam
The written take home final examination represents the final assessment for this class. You will have 48 hours from the time that this exam is made available to complete and submit your time final exam. Failure to submit the timed final exam document within the time period will result in your exam not being accepted. Use of your, notes, or other resources is strongly discouraged.
1) List and briefly explain the four steps in the scientific method.
2) Which of the following is the correct order of steps in the scientific method?
A
)
experiment, observation, hypothesis, conclusion
B
)
observation, experiment, hypothesis, conclusion
C
)
hypothesis, experiment, observation, conclusion
D
)
observation, hypothesis, experiment, conclusion
Answer:
3) The two most important organelles in forensic DNA analysis are the _________________ and __________________________.
4) The DNA laboratory genotypes three suspects DNA extracted from blood, and DNA extracted from hair roots found at the scene. When the technician draws a conclusion based on the genotyping results, the forensic term for this test or process is called _____________.
5) An experiment is designed to test an hypothesis.
A
)
True
B
)
False
Answer:
6) Due to television shows jurors are expecting to see perfect fingerprints and analyzable DNA on guns and other evidence. The absence of which has led jurors to exonerate otherwise guilty suspects. This is known as the ____ effect.
7) ___________________ is only inherited through the maternal lineage.
8) ______________________ is only inherited through the paternal lineage.
9) ________________________ is inherited through paternal and maternal lineages.
10) A mother is claiming that the only brother of her best friend is the father of her child. The brother is serving at a remote location in the easternmost reaches of Turkey. At the behest of his sister, the brother voluntarily provides DNA for a paternity test. Which of the following are the possible results and conclusions of the tests?
A
)
Since one-half of the alleles from the brother and child matched, then it is highly likely that the father is the brother.
B
)
Since none of the alleles from the brother matched, then it is highly unlikely that the father is the brother.
C
)
Since one-half the alleles did not match, it cannot be ruled out that the father is the brother.
D
)
Since only a few alleles match those of the child, it can be ruled out that the best friend is not the father.
11)
Answer:
11) How many permanent teeth are typically found in a human mouth?
A
)
18
B
)
32
C
)
30
D
)
36
Answer:
12) Measurements made on this bone, provide an accurate method of estimating the stature from skeletal remains
A
)
humerus
B
)
femur
C
)
tibia
D
)
fubula
Answer:
13) Given that the offspring of human parents ha.
BIOL 101 EXAM The following general directions apply to thi.docxhartrobert670
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 ...
The final exam for the Chemical Information Retrieval course CHEM367/767 in 2009 by Jean-Claude Bradley at Drexel University.
http://cheminfo2010.wikispaces.com
This document contains 70 multiple choice questions related to topics in biology including cell biology, genetics, DNA, genes, and genomes. The questions cover topics such as the phases of mitosis and meiosis, DNA replication, gene expression, transcription and translation, genome size and structure of various organisms including humans, and basic concepts in genetics and genomics.
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.
The prophet Muhammad (peace be upon him) said "Whoever cheats us is not one of us."
This document contains a 30 question multiple choice assessment test on neuroanatomy and neurophysiology. The questions cover topics like the structure and function of neurons and glial cells, the spinal cord, cranial nerves, brain anatomy, and motor and sensory pathways in the central nervous system.
BIOL 320 Final ExamThe written take home final examination rep.docxCruzIbarra161
The document is a study guide for a BIOL 320 final exam that will be taken at home over 48 hours. It provides 52 multiple choice and short answer questions covering topics like DNA, genetics, forensics, entomology, and anatomy. Students are warned that using outside resources on the take home exam is strongly discouraged.
The document contains 55 multiple choice practice questions covering a wide range of chemistry topics including laboratory safety, measurement, the periodic table, atomic structure, bonding, and nomenclature. The questions test understanding of fundamental concepts as well as ability to apply definitions, perform calculations, and analyze molecular structures and properties.
This document contains a model question paper for class 10 physical science with 40 total marks. It is divided into 4 sections:
1) Section I contains 4 mark questions with detailed answers required (16 marks total). Example questions include chemical reactions of calcium oxide and hydrochloric acid, and the use of detergents.
2) Section II contains short answer questions worth 4 marks total.
3) Section III contains very short answer questions worth 6 marks total.
4) Section IV contains multiple choice questions worth 6 marks total. The final section provides a blueprint of the question distribution.
Atoms are the basic unit of matter and are composed of protons, neutrons, and electrons. Elements are pure substances made of one type of atom, while isotopes are different forms of the same element that vary in the number of neutrons. Compounds are formed when two or more elements chemically combine in fixed proportions and have different properties than their constituent elements.
This document contains a 50 question chemistry mcqs test with an answer key. The test covers topics in general chemistry including the building blocks of matter, chemical formulas, chemical equations, states of matter, density, the periodic table, and acid-base chemistry. It is intended as a practice test for entry-level exams. The document was created by Dr. Sajid Ali Talpur and contains additional links to other chemistry and biology tests and study materials also authored by Dr. Talpur.
This document provides a multiple choice quiz on basic laboratory techniques related to blotting. It contains 33 questions testing understanding of techniques like Southern blotting, which is used to analyze the compositional properties of DNA, and transfers DNA from agarose gels to membranes. The questions cover topics like the purpose of blotting, what membranes are used, how large DNA fragments require longer transfer times, and what probes are commonly used in Southern blotting.
This document is a general science exam for 8th grade students containing 60 multiple choice questions testing knowledge of various science topics including:
- Units of measurement and scientific notation
- Properties of matter and the periodic table
- Chemical formulas and reactions
- Anatomy and physiology of human body systems
- Reproduction and disease
- Ecology and food webs
- Planets and astronomy
- Light and sound
- Electricity and magnetism
The exam covers a wide range of fundamental science concepts to evaluate student understanding of core ideas taught in the 8th grade general science curriculum.
Let's Integrate MuleSoft RPA, COMPOSER, APM with AWS IDP along with Slackshyamraj55
Discover the seamless integration of RPA (Robotic Process Automation), COMPOSER, and APM with AWS IDP enhanced with Slack notifications. Explore how these technologies converge to streamline workflows, optimize performance, and ensure secure access, all while leveraging the power of AWS IDP and real-time communication via Slack notifications.
TrustArc Webinar - 2024 Global Privacy SurveyTrustArc
How does your privacy program stack up against your peers? What challenges are privacy teams tackling and prioritizing in 2024?
In the fifth annual Global Privacy Benchmarks Survey, we asked over 1,800 global privacy professionals and business executives to share their perspectives on the current state of privacy inside and outside of their organizations. This year’s report focused on emerging areas of importance for privacy and compliance professionals, including considerations and implications of Artificial Intelligence (AI) technologies, building brand trust, and different approaches for achieving higher privacy competence scores.
See how organizational priorities and strategic approaches to data security and privacy are evolving around the globe.
This webinar will review:
- The top 10 privacy insights from the fifth annual Global Privacy Benchmarks Survey
- The top challenges for privacy leaders, practitioners, and organizations in 2024
- Key themes to consider in developing and maintaining your privacy program
BIO101 Midterm - Sacramento Valley Campus- June 2014TEST MName.docxhartrobert670
BIO101 Midterm - Sacramento Valley Campus- June 2014
TEST M
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Homologous chromosomes ______.
A) include only the autosomes
B) separate during interphase
C) include only the sex chromosomes
D) are a set of chromosomes that the cell received from one parent
E) carry the same genes
1)
2) Glucose molecules provide energy to power the swimming motion of sperm. In this example,
the sperm are changing ______.
A) kinetic energy into chemical energy
B) chemical energy into potential energy
C) kinetic energy into potential energy
D) chemical energy into kinetic energy
E) none of the above
2)
3) Examine the genetic code table, shown below. The codon AGC codes for the amino acid ______. 3)
1
A) serine
B) alanine
C) glycine
D) threonine
E) arginine
4) Hypophosphatemia (vitamin D-resistant rickets) is inherited as an sex-linked dominant trait.
The relevant gene is found on the X chromosome. What is the expected outcome of a cross
between a homozygous recessive woman and a man with hypophosphatemia?
A) Seventy-five percent of their offspring exhibit hypophosphatemia.
B) Twenty-five percent of their offspring exhibit hypophosphatemia.
C) Fifty percent of their daughters and fifty percent of their sons exhibit hypophosphatemia.
D) All of their daughters and none of their sons exhibit hypophosphatemia.
E) All of their sons and none of their daughters exhibit hypophosphatemia.
4)
Please read the following paragraph and answer the following question(s).
Amanda's parents realized that her body was not developing properly about the time she was 12 years old. She was
shorter than most of her friends and was not going through changes normally associated with female puberty. They took
her to a doctor who initially diagnosed Amanda with Turner Syndrome because of her physical features. He ordered a
karyotype that confirmed his diagnosis. Amanda was born with only one X chromosome. Although there is no specific
cure, the doctor was able to treat her and correct some of the problems associated with the condition. For example, she
received growth hormone to improve her growth and estrogen to help her develop the physical changes of puberty.
5) Amanda's abnormal number of sex chromosomes resulted from ______.
A) random fertilization
B) independent assortment of chromosomes
C) cytokinesis
D) nondisjunction
E) crossing over
5)
6) Speciation requires ______.
A) long periods of time
B) geographic isolation
C) periods of rapid evolutionary change
D) a mass extinction so that new environmental opportunities will be available to the
survivors
E) genetic isolation
6)
7) The ability to tolerate lactose throughout life is most likely to be seen in ______.
A) Native Americans
B) East Asian populations
C) populations that live in cold climates
D) cultures that keep dairy herds
E) populations that live in wet climates
7)
2
8) Which of the foll ...
Ch 31 Nuclear Physics and RadioactivityScott Thomas
This document provides an overview of key concepts in nuclear physics and radioactivity covered in Chapter 31, including:
1) Nuclear reactions such as conservation of mass number and charge in nuclear reactions. Mass-energy equivalence and how it relates to energy released in nuclear processes.
2) Properties of the nucleus including isotopes, mass number, and atomic number. The strong nuclear force that binds nucleons together.
3) Radioactive decay processes including alpha, beta, gamma decay and particle emissions. Applications of radioactivity such as smoke detectors and radiation therapy.
4) Additional topics covered are nuclear structure, binding energy, the mass defect, radioactive dating, and the neutrino. Learning objectives provide details on understanding these
This document provides 17 practice problems about chemistry concepts covered in Chapter 2 Part 1 of a Bio 110 textbook. The problems cover topics like the number of electrons in a single covalent bond, how changing neutrons creates isotopes, outer electron shells and ion formation, atom stability, common elements in living matter, similarities between elements in the same column, electron configuration of fluorine, drawing chlorine atoms, ion formation likelihood, bond polarity in methane and ammonia, bond type in sodium chloride, and using radioisotopes to trace substances in the body. Answers are provided at the bottom of the document.
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.
[Type text][Type text][Type text]BIOL 320 Final Exam BIO.docxhanneloremccaffery
[Type text] [Type text] [Type text]
BIOL 320 Final Exam
BIOL 320 Final Exam
The written take home final examination represents the final assessment for this class. You will have 48 hours from the time that this exam is made available to complete and submit your time final exam. Failure to submit the timed final exam document within the time period will result in your exam not being accepted. Use of your, notes, or other resources is strongly discouraged.
1) List and briefly explain the four steps in the scientific method.
2) Which of the following is the correct order of steps in the scientific method?
A
)
experiment, observation, hypothesis, conclusion
B
)
observation, experiment, hypothesis, conclusion
C
)
hypothesis, experiment, observation, conclusion
D
)
observation, hypothesis, experiment, conclusion
Answer:
3) The two most important organelles in forensic DNA analysis are the _________________ and __________________________.
4) The DNA laboratory genotypes three suspects DNA extracted from blood, and DNA extracted from hair roots found at the scene. When the technician draws a conclusion based on the genotyping results, the forensic term for this test or process is called _____________.
5) An experiment is designed to test an hypothesis.
A
)
True
B
)
False
Answer:
6) Due to television shows jurors are expecting to see perfect fingerprints and analyzable DNA on guns and other evidence. The absence of which has led jurors to exonerate otherwise guilty suspects. This is known as the ____ effect.
7) ___________________ is only inherited through the maternal lineage.
8) ______________________ is only inherited through the paternal lineage.
9) ________________________ is inherited through paternal and maternal lineages.
10) A mother is claiming that the only brother of her best friend is the father of her child. The brother is serving at a remote location in the easternmost reaches of Turkey. At the behest of his sister, the brother voluntarily provides DNA for a paternity test. Which of the following are the possible results and conclusions of the tests?
A
)
Since one-half of the alleles from the brother and child matched, then it is highly likely that the father is the brother.
B
)
Since none of the alleles from the brother matched, then it is highly unlikely that the father is the brother.
C
)
Since one-half the alleles did not match, it cannot be ruled out that the father is the brother.
D
)
Since only a few alleles match those of the child, it can be ruled out that the best friend is not the father.
11)
Answer:
11) How many permanent teeth are typically found in a human mouth?
A
)
18
B
)
32
C
)
30
D
)
36
Answer:
12) Measurements made on this bone, provide an accurate method of estimating the stature from skeletal remains
A
)
humerus
B
)
femur
C
)
tibia
D
)
fubula
Answer:
13) Given that the offspring of human parents ha.
BIOL 101 EXAM The following general directions apply to thi.docxhartrobert670
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 ...
The final exam for the Chemical Information Retrieval course CHEM367/767 in 2009 by Jean-Claude Bradley at Drexel University.
http://cheminfo2010.wikispaces.com
This document contains 70 multiple choice questions related to topics in biology including cell biology, genetics, DNA, genes, and genomes. The questions cover topics such as the phases of mitosis and meiosis, DNA replication, gene expression, transcription and translation, genome size and structure of various organisms including humans, and basic concepts in genetics and genomics.
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.
The prophet Muhammad (peace be upon him) said "Whoever cheats us is not one of us."
This document contains a 30 question multiple choice assessment test on neuroanatomy and neurophysiology. The questions cover topics like the structure and function of neurons and glial cells, the spinal cord, cranial nerves, brain anatomy, and motor and sensory pathways in the central nervous system.
BIOL 320 Final ExamThe written take home final examination rep.docxCruzIbarra161
The document is a study guide for a BIOL 320 final exam that will be taken at home over 48 hours. It provides 52 multiple choice and short answer questions covering topics like DNA, genetics, forensics, entomology, and anatomy. Students are warned that using outside resources on the take home exam is strongly discouraged.
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Atoms are the basic unit of matter and are composed of protons, neutrons, and electrons. Elements are pure substances made of one type of atom, while isotopes are different forms of the same element that vary in the number of neutrons. Compounds are formed when two or more elements chemically combine in fixed proportions and have different properties than their constituent elements.
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1. Biology Study Guide 1
1) Which of the following sequences represents the hierarchy of biological organization from the 1) _______
least to the most complex level?
A) cell, community, population, organ system, molecule, organelle
B) ecosystem, cell, population, tissue, organism, organ system
C) molecule, cell, organ system, population, ecosystem, biosphere
D) organism, community, biosphere, molecule, tissue, organ
E) organelle, tissue, biosphere, ecosystem, population, organism
2) Which of these is an example of an organelle? 2) _______
A) epidermis
B) intestine
C) muscle
D) chloroplast
E) maple leaf
3) Which of these is a correct representation of the hierarchy of biological organization from least to 3) _______
most complex?
A) hydrogen, water, muscle cell nucleus, heart muscle cell, heart, heart muscle tissue, human
B) heart muscle cell nucleus, hydrogen, water, heart muscle cell, heart, heart muscle tissue,
human
C) hydrogen, water, heart muscle cell, heart muscle cell nucleus, heart muscle tissue, heart,
human
D) hydrogen, water, heart muscle cell nucleus, heart muscle cell, heart muscle tissue, heart,
human
E) water, hydrogen, heart muscle cell nucleus, heart muscle cell, heart muscle tissue, heart,
human
4) Which of the following statements concerning prokaryotic and eukaryotic cells is not correct? 4) _______
A) Prokaryotic cells contain small membrane-enclosed organelles.
B) Eukaryotic cells contain a membrane-bound nucleus.
C) DNA or deoxyribonucleic acid is present in the nucleus of eukaryotic cells.
D) DNA, or deoxyribonucleic acid, is present in both prokaryotic cells and eukaryotic cells.
E) Prokaryotic cells lack a membrane-bound nucleus.
5) The chemical reactions within cells are regulated by organic catalysts called 5) _______
A) feedback activators.
B) metabolites.
C) enzymes.
D) feedback inhibitors.
E) nutrients.
6) Prokaryotic and eukaryotic cells generally have which of the following features in common? 6) _______
A) a cell wall made of cellulose
B) linear chromosomes made of DNA and protein
C) flagella or cilia that contain microtubules
D) ribosomes
E) a membrane-bounded nucleus
2. 7) What is a hypothesis? 7) _______
A) the same thing as an unproven theory
B) a verifiable observation sensed directly, or sensed indirectly with the aid of scientific
instrumentation
C) a fact based on quantitative data that is falsifiable
D) a tentative explanation that can be tested and is falsifiable
E) a fact based on qualitative data that is testable
8) A controlled experiment is one in which 8) _______
A) there are at least two groups, one differing from the other by two or more variables.
B) the experiment is repeated many times to ensure that the results are accurate.
C) there is one group for which the scientist controls all variables.
D) the experiment proceeds at a slow pace to guarantee that the scientist can carefully observe
all reactions and process all experimental data.
E) there are at least two groups, one of which does not receive the experimental treatment.
9) Why is it important that an experiment include a control group? 9) _______
A) A control group assures that an experiment will be repeatable.
B) Without a control group, there is no basis for knowing if a particular result is due to the
variable being tested or to some other factor.
C) The control group provides a reserve of experimental subjects.
D) The control group is the group that the reseacher is in control of; it is the group in which the
researcher predetermines the nature of the results.
E) A control group is required for the development of an "if; then" statement.
10) What is the primary reason for including a control group within the design of an experiment? 10) _____
A) To ensure that the results obtained are due to a difference in only one variable
B) To test the effect of more than one variable
C) To accumulate additional facts that can be reported to other scientists
D) To ensure that the experimenter can perform a more complete statistical analysis
E) To demonstrate in what way the experiment was performed incorrectly
11) About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 11) ______
elements make up approximately 96% of living matter?
A) carbon, sulfur, phosphorus, hydrogen
B) carbon, oxygen, sulfur, calcium
C) carbon, hydrogen, nitrogen, oxygen
D) oxygen, hydrogen, calcium, sodium
E) carbon, sodium, chlorine, nitrogen
12) Which of the following statements is false? 12) ______
A) An atom is the smallest unit of an element that still retains the properties of the element.
B) Atoms of the various elements differ in their number of subatomic particles.
C) Protons and electrons are electrically charged particles. Protons have one unit of negative
charge, and electrons have one unit of positive charge.
D) All atoms of a particular element have the same number of protons in their nuclei.
E) The neutrons and protons present in the nucleus of an atom are almost identical in mass;
each has a mass of about 1 dalton.
13) Each element is unique and different from other elements because of the number of protons in the 13) ______
nuclei of its atoms. Which of the following indicates the number of protons in an atom's nucleus?
3. A) atomic weight
B) mass weight
C) atomic mass
D) mass number
E) atomic number
14) The mass number of an element can be easily approximated by adding together the number of 14) ______
________ in an atom of that element.
A) protons and neutrons
B) isotopes
C) protons and electrons
D) neutrons and electrons
E) energy levels
15) What is the approximate atomic mass of an atom with 16 neutrons, 15 protons, and 15 electrons? 15) ______
A) 16 daltons B) 30 daltons C) 31 daltons D) 15 daltons E) 46 daltons
16) The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a 16) ______
correct statement concerning nitrogen?
A) The nitrogen atom has a mass number of 14 and an atomic mass of approximately 14 daltons.
B) The nitrogen atom has a mass number of 14 and an atomic mass of 7 grams.
C) The nitrogen atom has a mass number of approximately 14 daltons and an atomic mass of 7.
D) The nitrogen atom has a mass number of 7 grams and an atomic number of 14.
E) The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14.
17) Calcium has an atomic number of 20 and an atomic mass of 40. Therefore, a calcium atom must 17) ______
have
A) 40 electrons.
B) 20 protons.
C) 40 neutrons.
D) A and B only
E) A, B, and C
18) How do isotopes of the same element differ from each other? 18) ______
A) number of neutrons
B) amount of radioactivity
C) number of electrons
D) number of protons
E) valence electron distribution
19) The atomic number of carbon is 6. Carbon-14 is heavier than carbon-12 because the atomic 19) ______
nucleus of carbon-14 contains _____ neutrons.
A) 12 B) 14 C) 6 D) 8 E) 7
20) The atomic number of neon is 10. Therefore, which of the following is correct about an atom of 20) ______
neon?
A) It is inert.
B) It has 8 electrons in its outer electron shell.
C) It has an atomic mass of 10 daltons.
D) A and B only
E) A, B, and C are correct.
4. 21) Atoms whose outer electron shells contain eight electrons tend to 21) ______
A) form ionic bonds in aqueous solutions.
B) be isotopes and very radioactive.
C) be unstable and chemically very reactive.
D) form covalent bonds in aqueous solutions.
E) be stable and chemically nonreactive, or inert.
Use the information extracted f rom the periodic table in Figure 2.2 to answer the following questions.
Figure 2.2
22) How many electrons does nitrogen have in its valence shell? 22) ______
A) 2 B) 5 C) 8 D) 14 E) 7
23) How many electrons does phosphorus have in its valence shell? 23) ______
A) 2 B) 3 C) 4 D) 5 E) 1
24) How many neutrons are present in the nucleus of a phosphorus atom? 24) ______
A) 8 B) 46 C) 31 D) 15 E) 16
25) How many electrons would be expected in the outermost electron shell of an atom with atomic 25) ______
number 12?
A) 8 B) 2 C) 6 D) 1 E) 4
26) A covalent chemical bond is one in which 26) ______
A) outer-shell electrons of one atom are transferred to the inner electron shells of another atom.
B) electrons are removed from one atom and transferred to another atom so that the two atoms
become oppositely charged.
C) the inner-shell electrons of one atom are transferred to the outer shell of another atom.
D) protons and neutrons are shared by two atoms so as to satisfy the requirements of both
atoms.
E) outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron
shells of both atoms.
27) What do atoms form when they share electron pairs? 27) ______
A) aggregates
B) elements
C) molecules
D) ions
E) isotopes
28) What results from an unequal sharing of electrons between atoms? 28) ______
A) a hydrogen bond
B) a nonpolar covalent bond
C) a hydrophobic interaction
D) a polar covalent bond
E) an ionic bond
5. 29) The ionic bond of sodium chloride is formed when 29) ______
A) sodium gains an electron from chlorine.
B) sodium and chlorine share an electron pair.
C) chlorine gains a proton from sodium.
D) chlorine gains an electron from sodium.
E) sodium and chlorine both lose electrons from their outer valence shells.
30) What is the difference between covalent bonds and ionic bonds? 30) ______
A) Covalent bonds involve the sharing of electrons between atoms, and ionic bonds involve the
electrical attraction between atoms.
B) Covalent bonds involve the transfer of electrons between atoms, and ionic bonds involve
the sharing of neutrons between atoms.
C) Covalent bonds involve the sharing of neutrons between atoms, and ionic bonds involve the
sharing of electrons between atoms.
D) Covalent bonds involve the sharing of protons between atoms, and ionic bonds involve the
sharing of electrons between atoms.
E) Covalent bonds involve the sharing of protons between atoms, and ionic bonds involve the
sharing of neutrons between atoms.
Use these choices to answer the following questions.
A. nonpolar covalent bond
B. polar covalent bond
C. ionic bond
D. hydrogen bond
E. hydrophobic interaction
31) Results from a transfer of electron(s) between atoms. C. ionic bond 31) _____________
32) Explains most specifically the attraction of water molecules to one another. D. hydrogen 32) _____________
bond
33) In a single molecule of water, the two hydrogen atoms are bonded to a single oxygen atom by 33) ______
A) hydrogen bonds.
B) nonpolar covalent bonds.
C) ionic bonds.
D) van der Waals interactions.
E) polar covalent bonds.
34) The slight negative charge at one end of one water molecule is attracted to the slight positive 34) ______
charge of another water molecule. What is this attraction called?
A) an ionic bond
B) a hydrophobic bond
C) a hydrogen bond
D) a hydrophilic bond
E) a covalent bond
35) Hydrophobic substances such as vegetable oil are 35) ______
A) nonpolar substances that have an attraction for water molecules.
B) nonpolar substances that repel water molecules.
C) polar substances that repel water molecules.
D) polar substances that have an affinity for water.
E) charged molecules that hydrogen-bond with water molecules.
6. 36) What would be the pH of a solution with a hydrogen ion [ ] concentration of M? 36) ______
A) pH 4 B) pH 2 C) pH 10 D) pH 8 E) pH 6
37) Which of the following solutions has the greatest concentration of hydrogen ions 37) ______
A) gastric juice at pH 2
B) tomato juice at pH 4
C) vinegar at pH 3
D) household bleach at pH 12
E) black coffee at pH 5
38) Which of the following solutions has the greatest concentration of hydroxide ions 38) ______
A) lemon juice at pH 2
B) urine at pH 6
C) vinegar at pH 3
D) seawater at pH 8
E) tomato juice at pH 4
39) If the pH of a solution is decreased from 9 to 8, it means that the 39) ______
A) concentration of has decreased 10 times what it was at pH 9.
B) concentration of has increased 10 times what it was at pH 9.
C) concentration of has increased 10 times what it was at pH 9.
D) concentration of has decreased 10 times what it was at pH 9.
E) B and D are correct.
40) One liter of a solution of pH 2 has how many more hydrogen ions ( ) than 1 L of a solution of 40) ______
pH 6 ?
A) 10,000 times more
B) 100,000 times more
C) 4 times more
D) 400 times more
E) 4,000 times more
41) Which two functional groups are always found in amino acids? 41) ______
A) hydroxyl and aldehyde
B) phosphate and sulfhydryl
C) carboxyl and amino
D) carbonyl and carboxyl
E) ketone and aldehyde
42) Which of the following is not on e of the four major groups of macromolecules found in living 42) ______
organisms?
A) lipids
B) glucose
C) carbohydrates
D) proteins
E) nucleic acids
7. 43) Polymers of polysaccharides, fats, and proteins are all synthesized from monomers by which 43) ______
process?
A) the formation of disulfide bridges between monomers
B) the addition of water to each monomer (hydrolysis)
C) the removal of water (dehydration reactions)
D) ionic bonding of the monomers
E) connecting monosaccharides together (condensation reactions)
44) Which of the following is true of both starch and cellulose? 44) ______
A) They are both structural components of the plant cell wall.
B) They are both polymers of glucose.
C) They are both used for energy storage in plants.
D) They can both be digested by humans.
E) They are geometric isomers of each other.
Figure 5.3
45) The molecule shown in Figure 5.3 is a 45) ______
A) saturated fatty acid.
B) polypeptide.
C) polysaccharide.
D) unsaturated fatty acid.
E) triacylglycerol.
46) A polypeptide can best be described as a 46) ______
A) polymer containing 20 peptide bonds.
B) monomer of a protein polymer.
C) polymer containing 20 amino acid molecules.
D) polymer containing 19 peptide bonds.
E) polymer of amino acids.
Figure 5.5
47) The chemical reaction illustrated in Figure 5.5 results in the formation of a (an) 47) ______
A) ester linkage.
B) peptide bond.
C) ionic bond.
D) glycosidic linkage.
E) phosphodiester linkage.
8. 48) Upon chemical analysis, a particular protein was found to contain 556 amino acids. How many 48) ______
peptide bonds are present in this protein?
A) 558 B) 139 C) 556 D) 554 E) 555
49) Which of the following descriptions best fits the class of molecules known as nucleotides? 49) ______
A) a pentose sugar and a purine or pyrimidine
B) a nitrogenous base and a phosphate group
C) a nitrogenous base, a phosphate group, and a pentose sugar
D) a nitrogenous base and a pentose sugar
E) a phosphate group and an adenine or uracil
50) Which of the following are nitrogenous bases of the pyrimidine type? 50) ______
A) thymine and guanine
B) guanine and adenine
C) ribose and deoxyribose
D) adenine and thymine
E) cytosine and uracil
51) Which of the following are nitrogenous bases of the purine type? 51) ______
A) uracil and cytosine
B) thymine and uracil
C) guanine and adenine
D) adenine and thymine
E) cytosine and guanine
52) All of the following nitrogenous bases are found in DNA except 52) ______
A) guanine. B) thymine. C) adenine. D) uracil. E) cytosine.
53) Which of the following is an example of hydrolysis? 53) ______
A) the synthesis of a nucleotide from a phosphate, a pentose sugar, and a nitrogenous base
with the production of a molecule of water
B) the synthesis of two amino acids, forming a peptide with the release of water
C) the reaction of two monosaccharides, forming a disaccharide with the release of water
D) the reaction of a fat, forming glycerol and fatty acids with the utilization of water
E) the reaction of a fat, forming glycerol and fatty acids with the release of water
54) The element nitrogen is present in all of the following except 54) ______
A) nucleic acids.
B) monosaccharides.
C) amino acids.
D) DNA.
E) proteins.
55) Large numbers of ribosomes are present in cells that specialize in producing which of the 55) ______
following molecules?
A) lipids B) starches C) glucose D) proteins E) steroids
9. 56) Which type of organelle is primarily involved in the synthesis of oils, phospholipids, and 56) ______
steroids?
A) smooth endoplasmic reticulum
B) ribosome
C) contractile vacuole
D) mitochondrion
E) lysosome
57) Which structure is the site of the synthesis of proteins that may be exported from the cell? 57) ______
A) rough ER
B) tight junctions
C) plasmodesmata
D) Golgi vesicles
E) lysosomes
58) Which of the following cell components is not directly involved in synthesis or secretion? 58) ______
A) ribosome
B) lysosome
C) rough endoplasmic reticulum
D) Golgi body
E) smooth endoplasmic reticulum
Refer to the following five terms to answer the following questions. Choose the most appropriate term for each ph rase. Each term may be
used once, more than once, or not at all.
A. lysosome
B. vacuole
C. mitochondrion
D. Golgi apparatus
E. peroxisome
59) produces and modifies polysaccharides that will be secreted D) Golgi apparatus 59) _____________
60) contains hydrolytic enzymes A) lysosome 60) _____________
61) helps to recycle the cell's organic material A) lysosome 61) _____________
62) one of the main energy transformers of cells C) mitochondrion 62) _____________
63) contains its own DNA and ribosomes C) mitochondrion 63) _____________
64) a compartment that often takes up much of the volume of a plant cell B) vacuole 64) _____________
65) Grana, thylakoids, and stroma are all components found in 65) ______
A) mitochondria.
B) nuclei.
C) lysosomes.
D) chloroplasts.
E) vacuoles.
10. 66) Which of the following are capable of converting light energy to chemical energy? 66) ______
A) peroxisomes
B) mitochondria
C) chloroplasts
D) Golgi bodies
E) leucoplasts
67) Motor proteins provide for molecular motion in cells by interacting with what types of cellular 67) ______
structures?
A) membrane proteins
B) cytoskeletons
C) ribosomes
D) sites of energy production in cellular respiration
E) cellulose fibers in the cell wall
68) Which of the following pairs is mismatched? 68) ______
A) Lysosome - protein synthesis
B) cell membrane - lipid bilayer
C) Nucleus - DNA replication
D) Cytoskeleton - microtubules
E) Nucleolus - ribosomal RNA
69) Ions can travel directly from the cytoplasm of one animal cell to the cytoplasm of an adjacent cell 69) ______
through
A) desmosomes.
B) plasmodesmata.
C) tight junctions.
D) gap junctions.
E) intermediate filaments.
70) Which of the following types of molecules are the major structural components of the cell 70) ______
membrane?
A) proteins and cellulose
B) phospholipids and proteins
C) nucleic acids and proteins
D) phospholipids and cellulose
E) glycoproteins and cholesterol
71) The presence of cholesterol in the plasma membranes of some animals 71) ______
A) enables the animal to remove hydrogen atoms from saturated phospholipids.
B) makes the animal more susceptible to circulatory disorders.
C) makes the membrane less flexible, allowing it to sustain greater pressure from within the
cell.
D) enables the membrane to stay fluid more easily when cell temperature drops.
E) enables the animal to add hydrogen atoms to unsaturated phospholipids.
72) All of the following are functions of integral membrane proteins except 72) ______
A) cytoskeleton attachment.
B) protein synthesis.
C) active transport.
D) cell adhesion.
E) hormone reception.
11. 73) Which of the following is correct about integral membrane proteins? 73) ______
A) They are not mobile within the bilayer.
B) They are loosely bound to the surface of the bilayer.
C) They serve only a structural role in membranes.
D) They lack tertiary structure.
E) They are usually transmembrane proteins.
74) What is one of the functions of cholesterol in animal cell membranes? 74) ______
A) stores energy
B) maintains membrane fluidity
C) facilitates transport of ions
D) phosphorylates ADP
E) speeds diffusion
75) What membrane-surface molecules are thought to be most important as cells recognize each 75) ______
other?
A) integral proteins
B) glycoproteins
C) peripheral proteins
D) phospholipids
E) cholesterol
76) What kinds of molecules pass through a cell membrane most easily? 76) ______
A) large and hydrophobic
B) small and hydrophobic
C) monosaccharides such as glucose
D) ionic
E) large polar
77) Which of the following would likely move through the lipid bilayer of a plasma membrane most 77) ______
rapidly?
A) glucose
B) K+
C) an amino acid
D) starch
E) CO2
78) Which of the following statements is correct about diffusion? 78) ______
A) It requires integral proteins in the cell membrane.
B) It requires an expenditure of energy by the cell.
C) It is very rapid over long distances.
D) It is a passive process in which molecules move from a region of higher concentration to a
region of lower concentration.
E) It is an active process in which molecules move from a region of lower concentration to one
of higher concentration.
12. 79) A patient has had a serious accident and lost a lot of blood. In an attempt to replenish body fluids, 79) ______
distilled water, equal to the volume of blood lost, is transferred directly into one of his veins.
What will be the most probable result of this transfusion?
A) The patient's red blood cells will shrivel up because the blood fluid is hypotonic compared
to the cells.
B) It will have no unfavorable effect as long as the water is free of viruses and bacteria.
C) The patient's red blood cells will swell because the blood fluid is hypotonic compared to the
cells.
D) The patient's red blood cells will burst because the blood fluid is hypertonic compared to the
cells.
E) The patient's red blood cells will shrivel up because the blood fluid is hypertonic compared
to the cells.
80) A cell whose cytoplasm has a concentration of 0.02 molar glucose is placed in a test tube of water 80) ______
containing 0.02 molar glucose. Assuming that glucose is not actively transported into the cell,
which of the following terms describes the tonicity of the external solution relative to the
cytoplasm of the cell?
A) hypertonic
B) isotonic
C) hypotonic
D) turgid
E) flaccid
81) All of the following membrane activities require energy from ATP hydrolysis except 81) ______
A) ions moving out of the cell.
B) facilitated diffusion.
C) translocation of potassium into a cell.
D) active transport.
E) proton pumps.
82) What are the membrane structures that function in active transport? 82) ______
A) carbohydrates
B) cholesterol
C) integral proteins
D) peripheral proteins
E) cytoskeleton filaments
83) The movement of a substance across a biological membrane against its concentration gradient 83) ______
with the help of energy input is
A) active transport.
B) osmosis.
C) facilitated diffusion.
D) diffusion.
E) exocytosis.
84) White blood cells engulf bacteria through what process? 84) ______
A) pinocytosis
B) receptor-mediated exocytosis
C) osmosis
D) phagocytosis
E) exocytosis
13. 85) According to the first law of thermodynamics, 85) ______
A) systems rich in energy are intrinsically unstable and will give up energy with time.
B) energy can be neither created nor destroyed.
C) the universe loses energy because of heat production.
D) A and B only
E) A, B, and C
86) Which of the following is true for all exergonic reactions? 86) ______
A) The reactions are nonspontaneous.
B) The products have more total energy than the reactants.
C) Some reactants will be converted to products.
D) A net input of en ergy from the surroundings is required for the reactions to proceed.
E) The reaction proceeds with a net release of free en ergy.
87) Why is ATP an important molecule in metabolism? 87) ______
A) Its terminal phosphate group contains a strong covalent bond that when hydrolyzed
releases free energy.
B) It provides energy coupling between exergonic and endergonic reactions.
C) Its hydrolysis provides an input of free en ergy for exergonic reactions.
D) A and B only
E) A, B and C
88) What term is used to describe the transfer of free energy from catabolic pathways to anabolic 88) ______
pathways?
A) feedback regulation
B) entropy
C) bioenergetics
D) cooperativity
E) energy coupling
89) Which of the following statements is true concerning catabolic pathways? 89) ______
A) They build up complex molecules such as protein from simpler compounds.
B) They combine molecules into more energy-rich molecules.
C) They are usually coupled with anabolic pathways to which they supply energy in the form
of ATP.
D) They are endergonic.
E) They are spontaneous and do not need enzyme catalysis.
90) How can one increase the rate of a chemical reaction? 90) ______
A) Add a catalyst.
B) Decrease the concentration of the reactants.
C) Cool the reactants.
D) Increase the entropy of the reactants.
E) Increase the activation energy needed.
91) Reactants capable of interacting to form products in a chemical reaction must first overcome a 91) ______
thermodynamic barrier known as the reaction's
A) endothermic level.
B) activation energy.
C) free-energy content.
D) heat content.
E) entropy.
14. 92) Which of the following statements regarding enzymes is true? 92) ______
A) Enzymes prevent changes in substrate concentrations.
B) Enzymes increase the rate of a reaction.
C) Enzymes are permanently altered by the reactions they catalyze.
D) Enzymes decrease the free en ergy change of a reaction.
E) Enzymes change the direction of chemical reactions.
93) An enzyme catalyzes a reaction by 93) ______
A) supplying the energy to speed up a reaction.
B) lowering the ∆G of a reaction.
C) lowering the energy of activation of a reaction.
D) increasing the amount of free energy of a reaction.
E) changing the equilibrium of a spontaneous reaction.
94) Which of these statements regarding enzymes is false? 94) ______
A) An enzyme may be used many times over for a specific reaction.
B) Enzymes are proteins that function as catalysts.
C) Enzymes provide activation energy for the reactions they catalyze.
D) The activity of enzymes can be regulated by other molecules.
E) Enzymes display specificity for certain molecules with which they interact.
95) The active site of an enzyme is the region that 95) ______
A) is involved in the catalytic reaction of the enzyme.
B) binds the products of the catalytic reaction.
C) is inhibited by the presence of a coenzyme or a cofactor.
D) binds allosteric regulators of the enzyme.
E) both A and B
96) According to the induced fit hypothesis of enzyme catalysis, which of the following is correct? 96) ______
A) The binding of the substrate changes the shape of the enzyme's active site.
B) The active site creates a microenvironment ideal for the reaction.
C) Some enzymes change their structure when activators bind to the enzyme.
D) A competitive inhibitor can outcompete the substrate for the active site.
E) The binding of the substrate depends on the shape of the active site.
97) Increasing the substrate concentration in an enzymatic reaction could overcome which of the 97) ______
following?
A) insufficient cofactors
B) allosteric inhibition
C) saturation of the enzyme activity
D) competitive inhibition
E) denaturization of the enzyme
98) Which of the following is true of enzymes? 98) ______
A) Enzyme function is reduced if the three-dimensional structure or conformation of an
enzyme is altered.
B) Enzymes may require a nonprotein cofactor or ion for catalysis to take place.
C) Enzymes increase the rate of chemical reaction by lowering activation energy barriers.
D) Enzyme function is influenced by physical and chemical environmental factors such as pH
and temperature.
E) All of the above are true of enzymes.
15. 99) The mechanism in which the end product of a metabolic pathway inhibits an earlier step in the 99) ______
pathway is known as
A) reversible inhibition.
B) metabolic inhibition.
C) feedback inhibition.
D) allosteric inhibition.
E) noncooperative inhibition.
100) How does a non-competitive inhibitor decrease the rate of an enzyme reaction? 100) _____
A) by changing the structure of the enzyme
B) by changing the free energy change of the reaction
C) by binding at the active site of the enzyme
D) by decreasing the activation energy of the reaction
E) by acting as a coenzyme for the reaction
ANSWER KEY: Answers are highlighted