Question 1

The Hershey-Chase experiment determined that

Accepted Answer

A)  protein and DNA are the hereditary materials of viruses. 
B)  protein, not DNA, is the hereditary material of viruses. 
C)  viruses do not contain hereditary material. 
D)  DNA, not protein, is the hereditary material of viruses. 
E)  None of the above 
A)  protein and DNA are the hereditary materials of viruses. 
B)  protein, not DNA, is the hereditary material of viruses. 
C)  viruses do not contain hereditary material. 
D)  DNA, not protein, is the hereditary material of viruses. 
E)  None of the above

Question 2

The Hershey-Chase experiment

Accepted Answer

A)  exploited an RNA virus and a prokaryote. 
B)  made use of the fact that DNA contains sulfur and proteins do not. 
C)  labeled the RNA of the bacterium with radioactive phosphorous. 
D)  labeled the protein coat of a bacterial virus with radioactive sulfur. 
E)  labeled the DNA of the virus with radioactive sulfur. 
A)  exploited an RNA virus and a prokaryote. 
B)  made use of the fact that DNA contains sulfur and proteins do not. 
C)  labeled the RNA of the bacterium with radioactive phosphorous. 
D)  labeled the protein coat of a bacterial virus with radioactive sulfur. 
E)  labeled the DNA of the virus with radioactive sulfur.

Question 3

If 20 percent of the bases in a sample of double stranded DNA is adenine, what percentage of the bases would be uracil?

Accepted Answer

A)  20 
B)  10 
C)  30 
D)  0 
E)  15 
A)  20 
B)  10 
C)  30 
D)  0 
E)  15

Question 4

Semiconservative replication of DNA involves

Accepted Answer

A)  each of the original strands acting as a template for a new strand. 
B)  only one of the original strands acting as a template for a new strand. 
C)  the complete separation of the original strands, the synthesis of new strands, and the reassembly of double-stranded molecules. 
D)  the use of the intact double-stranded molecule as a template. 
E)  None of the above 
A)  each of the original strands acting as a template for a new strand. 
B)  only one of the original strands acting as a template for a new strand. 
C)  the complete separation of the original strands, the synthesis of new strands, and the reassembly of double-stranded molecules. 
D)  the use of the intact double-stranded molecule as a template. 
E)  None of the above

Question 5

In the 1920s a dye was developed that bound to DNA and stained nuclei in direct proportion to the amount of DNA present in cells. The resulting experiments

Accepted Answer

A)  provided circumstantial evidence that DNA is the genetic material. 
B)  proved DNA is the genetic material. 
C)  demonstrated that all species had the same amount of nuclear DNA. 
D)  demonstrated that diploid and haploid cells could not have differing amounts of DNA. 
E)  confirmed that DNA was an important component of mitochondria and chloroplasts. 
A)  provided circumstantial evidence that DNA is the genetic material. 
B)  proved DNA is the genetic material. 
C)  demonstrated that all species had the same amount of nuclear DNA. 
D)  demonstrated that diploid and haploid cells could not have differing amounts of DNA. 
E)  confirmed that DNA was an important component of mitochondria and chloroplasts.

Question 6

If a high concentration of a particular nucleotide lacking a hydroxyl group at the 3´ end is added to a PCR reaction,

Accepted Answer

A)  no additional nucleotides will be added to a growing strand containing that nucleotide. 
B)  strand elongation will proceed as normal. 
C)  nucleotides will be added only at the 5´ end. 
D)  T. aquaticus DNA polymerase will become non­functional. 
E)  the primer will be unable to anneal with the DNA template. 
A)  no additional nucleotides will be added to a growing strand containing that nucleotide. 
B)  strand elongation will proceed as normal. 
C)  nucleotides will be added only at the 5´ end. 
D)  T. aquaticus DNA polymerase will become non­functional. 
E)  the primer will be unable to anneal with the DNA template.

Question 7

In the cells of prokaryotes, methylated adenine contributes to

Accepted Answer

A)  an increased rate of DNA replication. 
B)  a slowed rate of DNA replication. 
C)  the correct separation of DNA strands. 
D)  proofreading of replicated strands. 
E)  correcting of mismatched pairs of bases. 
A)  an increased rate of DNA replication. 
B)  a slowed rate of DNA replication. 
C)  the correct separation of DNA strands. 
D)  proofreading of replicated strands. 
E)  correcting of mismatched pairs of bases.

Question 8

Arthur Kornberg showed that DNA could replicate in the test tube if it contained intact DNA for a template, a mixture of the four precursors (the four nucleoside triphosphates), and _______.

Accepted Answer

The answer of Arthur Kornberg showed that DNA could replicate...

Question 9

The nitrogenous bases (and the two strands of the DNA double helix) are held together by

Accepted Answer

A)  weak van der Waals forces. 
B)  covalent bonds. 
C)  hydrogen bonds. 
D)  Both a and b 
E)  Both a and c 
A)  weak van der Waals forces. 
B)  covalent bonds. 
C)  hydrogen bonds. 
D)  Both a and b 
E)  Both a and c

Question 10

In bacteria, the enzyme that replicates the lagging strand is _______.

Accepted Answer

The answer of In bacteria, the enzyme that replicates the...

Question 11

Eukaryotic chromosomes

Accepted Answer

A)  contain linear molecules of single-stranded DNA. 
B)  normally have uncoiled DNA. 
C)  have multiple origins of replication. 
D)  have two replication forks that move in the same direction. 
E)  are composed entirely of DNA. 
A)  contain linear molecules of single-stranded DNA. 
B)  normally have uncoiled DNA. 
C)  have multiple origins of replication. 
D)  have two replication forks that move in the same direction. 
E)  are composed entirely of DNA.

Question 12

The telomeres at the ends of linear chromosomes allow

Accepted Answer

A)  the 5´ ends of the chromosomes to undergo recombination. 
B)  the gaps left by primer removal of lagging strands to be repaired by telomerase. 
C)  DNA repair enzymes to recognize those ends and remove them. 
D)  normal cells to divide continuously. 
E)  DNA breaks to be examined at cell division checkpoints. 
A)  the 5´ ends of the chromosomes to undergo recombination. 
B)  the gaps left by primer removal of lagging strands to be repaired by telomerase. 
C)  DNA repair enzymes to recognize those ends and remove them. 
D)  normal cells to divide continuously. 
E)  DNA breaks to be examined at cell division checkpoints.

Question 13

The region of DNA where replication begins is called the _______.

Accepted Answer

origin of

Question 14

Differentiate between proofreading, mismatch repair, and excision repair. Which of these repair mechanisms is responsible for repairing a mutation that occurs in an adult cell from overexposure to the sun? Explain your answer.

Accepted Answer

Proofreading occurs during synthesis of

Question 15

Griffith's studies of Streptococcus pneumoniae

Accepted Answer

A)  showed that DNA is the genetic material of bacteria. 
B)  showed that DNA is the genetic material of bacteriophage. 
C)  demonstrated the phenomenon of bacterial transformation. 
D)  proved that prokaryotes reproduce sexually. 
E)  proved that protein is not the genetic material. 
A)  showed that DNA is the genetic material of bacteria. 
B)  showed that DNA is the genetic material of bacteriophage. 
C)  demonstrated the phenomenon of bacterial transformation. 
D)  proved that prokaryotes reproduce sexually. 
E)  proved that protein is not the genetic material.

Question 16

Given the following parent strand sequence, what would the daughter strand sequence look like?
5´ - G C T A A C T G T G A T C G T A T A A G C T G A - 3´

Accepted Answer

3´ - C G A T T G A C

Question 17

A-T base pairs in a DNA double helix

Accepted Answer

A)  are not accessible to DNA binding proteins. 
B)  are chemically distinct from G-C base pairs. 
C)  form three hydrogen bonds with each other. 
D)  are of a different length than G-C base pairs. 
E)  are more heat stable than G-C base pairs. 
A)  are not accessible to DNA binding proteins. 
B)  are chemically distinct from G-C base pairs. 
C)  form three hydrogen bonds with each other. 
D)  are of a different length than G-C base pairs. 
E)  are more heat stable than G-C base pairs.

Question 18

An enzyme that catalyzes the addition of any lost telomere sequences is _______.

Accepted Answer

The answer of An enzyme that catalyzes the addition of...

Question 19

If 20 percent of the bases in a sample of double-stranded DNA is adenine, what percentage of the bases would be cytosine?

Accepted Answer

A)  15 
B)  30 
C)  70 
D)  35 
E)  40 
A)  15 
B)  30 
C)  70 
D)  35 
E)  40

Question 20

Which of the following does not occur during DNA replication?

Accepted Answer

A)  Unwinding of the parent double helix 
B)  Formation of short pieces that are connected by DNA ligase 
C)  Complementary base pairing 
D)  Use of a primer 
E)  Polymerization in the 3´-to-5´ direction 
A)  Unwinding of the parent double helix 
B)  Formation of short pieces that are connected by DNA ligase 
C)  Complementary base pairing 
D)  Use of a primer 
E)  Polymerization in the 3´-to-5´ direction

Exam 13: Dna and Its Role in Heredity

The Hershey-Chase experiment determined that

The Hershey-Chase experiment

If 20 percent of the bases in a sample of double stranded DNA is adenine, what percentage of the bases would be uracil?

Semiconservative replication of DNA involves

In the 1920s a dye was developed that bound to DNA and stained nuclei in direct proportion to the amount of DNA present in cells. The resulting experiments

If a high concentration of a particular nucleotide lacking a hydroxyl group at the 3´ end is added to a PCR reaction,

In the cells of prokaryotes, methylated adenine contributes to

Arthur Kornberg showed that DNA could replicate in the test tube if it contained intact DNA for a template, a mixture of the four precursors (the four nucleoside triphosphates), and _______.

The nitrogenous bases (and the two strands of the DNA double helix) are held together by

In bacteria, the enzyme that replicates the lagging strand is _______.

Eukaryotic chromosomes

The telomeres at the ends of linear chromosomes allow

The region of DNA where replication begins is called the _______.

Differentiate between proofreading, mismatch repair, and excision repair. Which of these repair mechanisms is responsible for repairing a mutation that occurs in an adult cell from overexposure to the sun? Explain your answer.

Griffith's studies of Streptococcus pneumoniae

Given the following parent strand sequence, what would the daughter strand sequence look like? 5´ - G C T A A C T G T G A T C G T A T A A G C T G A - 3´

A-T base pairs in a DNA double helix

An enzyme that catalyzes the addition of any lost telomere sequences is _______.

If 20 percent of the bases in a sample of double-stranded DNA is adenine, what percentage of the bases would be cytosine?

Which of the following does not occur during DNA replication?

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Signaling and Communication

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

Ecology and the Distribution of Life

Population Ecology

Species Interaction and Coevolution

Community Ecology

Ecosystems and Global Ecology

Conservation Biology

Filters