Question 1

Which of the following statements is FALSE with regard to DNA replication?

Accepted Answer

A)  DNA synthesis proceeds in the 5'->3' direction. 
B)  The strand being copied is read in the 5'->3' direction. 
C)  Both strands replicate at the same time. 
D)  The position of the replication fork is constantly moving. 
E)  Two identical DNA polymerase molecules catalyze replication. 
A)  DNA synthesis proceeds in the 5'->3' direction. 
B)  The strand being copied is read in the 5'->3' direction. 
C)  Both strands replicate at the same time. 
D)  The position of the replication fork is constantly moving. 
E)  Two identical DNA polymerase molecules catalyze replication.

Question 2

In replication, once the DNA strands have been separated, reformation of the double helix is prevented by:

Accepted Answer

A)  DNA helicase enzyme. 
B)  single-strand binding proteins. 
C)  DNA polymerases. 
D)  ATP. 
E)  DNA primase. 
A)  DNA helicase enzyme. 
B)  single-strand binding proteins. 
C)  DNA polymerases. 
D)  ATP. 
E)  DNA primase.

Question 3

Replication typically occurs at a single origin(s) of replication in eukaryotic chromosomes.

Accepted Answer

A) True 
 B)False

Question 4

An RNA primer is synthesized by RNA primase . 
__________________

Accepted Answer

A) True 
 B)False

Question 5

How does the degradation of telomeres result in cellular aging?

Accepted Answer

Concepts to Consider: Telomeres, which a

Question 6

Figure 12-1   The chemical group in box 5 of the accompanying figure is a:

Accepted Answer

A)  hydrogen bond. 
B)  phosphate. 
C)  nucleotide. 
D)  pyrimidine. 
E)  protein. 
A)  hydrogen bond. 
B)  phosphate. 
C)  nucleotide. 
D)  pyrimidine. 
E)  protein.

Question 7

According to Chargaff's rules:

Accepted Answer

A)  the number of A-T base pairs is always equal to the number of G-C base pairs in all DNA molecules. 
B)  the adenine content in any DNA molecule is always equal to the thymine content. 
C)  the adenine content in any DNA molecule is always greater than the thymine content. 
D)  the guanine content in any DNA molecule is always less than the cytosine content. 
E)  there is no relationship between the ratio of purine and pyrimidine content in any DNA molecule. 
A)  the number of A-T base pairs is always equal to the number of G-C base pairs in all DNA molecules. 
B)  the adenine content in any DNA molecule is always equal to the thymine content. 
C)  the adenine content in any DNA molecule is always greater than the thymine content. 
D)  the guanine content in any DNA molecule is always less than the cytosine content. 
E)  there is no relationship between the ratio of purine and pyrimidine content in any DNA molecule.

Question 8

Errors in DNA replication can come from:

Accepted Answer

A)  DNA polymerase. 
B)  DNA ligase. 
C)  complementary base pairing. 
D)  the sun's UV radiation. 
E)  Okazaki fragments. 
A)  DNA polymerase. 
B)  DNA ligase. 
C)  complementary base pairing. 
D)  the sun's UV radiation. 
E)  Okazaki fragments.

Question 9

Hydrogen bonds can form between guanine and ____, and between adenine and ____.

Accepted Answer

A)  phosphate; sugar 
B)  thymine; cytosine 
C)  cytosine; thymine 
D)  sugar; phosphate 
E)  adenine; guanine 
A)  phosphate; sugar 
B)  thymine; cytosine 
C)  cytosine; thymine 
D)  sugar; phosphate 
E)  adenine; guanine

Question 10

Figure 12-1   The chemical group box 1 in the accompanying figure is a:

Accepted Answer

A)  pyrimidine. 
B)  purine. 
C)  phosphate. 
D)  amino acid. 
E)  covalent bond. 
A)  pyrimidine. 
B)  purine. 
C)  phosphate. 
D)  amino acid. 
E)  covalent bond.

Question 11

What allows each strand of DNA to serve as a template for a new DNA strand during replication?

Accepted Answer

A)  covalent bonding between nucleotide bases 
B)  hydrogen bonds between the deoxyribose and the phosphate groups 
C)  complementary base pairing between purines and purines on opposite strands 
D)  complementary base pairing between pyrimidines and pyrimidines on opposite strands 
E)  complementary base pairing between purines and pyrimidines on opposite strands 
A)  covalent bonding between nucleotide bases 
B)  hydrogen bonds between the deoxyribose and the phosphate groups 
C)  complementary base pairing between purines and purines on opposite strands 
D)  complementary base pairing between pyrimidines and pyrimidines on opposite strands 
E)  complementary base pairing between purines and pyrimidines on opposite strands

Question 12

DNA:

Accepted Answer

A)  is composed of nucleotide building blocks. 
B)  contains uracil instead of thymine. 
C)  is single-stranded. 
D)  contains pyrimidines and purines in a 2:1 ratio. 
E)  contains the sugar ribose. 
A)  is composed of nucleotide building blocks. 
B)  contains uracil instead of thymine. 
C)  is single-stranded. 
D)  contains pyrimidines and purines in a 2:1 ratio. 
E)  contains the sugar ribose.

Question 13

Enzymes called ____ form breaks in the DNA molecules to prevent the formation of knots in the DNA helix during replication.

Accepted Answer

A)  topoisomerases 
B)  single-strand binding proteins 
C)  DNA polymerases 
D)  RNA polymerases 
E)  DNA ligases 
A)  topoisomerases 
B)  single-strand binding proteins 
C)  DNA polymerases 
D)  RNA polymerases 
E)  DNA ligases

Question 14

The bacteriophages used in Alfred Hershey's and Martha Chase's experiments showed that:

Accepted Answer

A)  DNA was injected into bacteria. 
B)  DNA and protein were injected into bacteria. 
C)  DNA remained on the outer coat of bacteria. 
D)  proteins were injected into bacteria. 
E)  proteins were responsible for the production of new viruses within the bacteria. 
A)  DNA was injected into bacteria. 
B)  DNA and protein were injected into bacteria. 
C)  DNA remained on the outer coat of bacteria. 
D)  proteins were injected into bacteria. 
E)  proteins were responsible for the production of new viruses within the bacteria.

Question 15

Compare and contrast DNA synthesis in prokaryotes and eukaryotes.

Accepted Answer

The process of DNA replication in prokar

Question 16

DNA Pol III catalyzes the addition of successive nucleotides to the 5' end of a growing polynucleotide chain. 
__________________

Accepted Answer

A) True 
 B)False

Question 17

Which of the following causes the unwinding of the DNA double helix?

Accepted Answer

A)  DNA polymerase 
B)  DNA helicase 
C)  RNA primer 
D)  primosome 
E)  RNA polymerase 
A)  DNA polymerase 
B)  DNA helicase 
C)  RNA primer 
D)  primosome 
E)  RNA polymerase

Question 18

From the DNA X-ray crystallography data, Franklin and Wilkins inferred that ____ while Watson and Crick determined that ____.

Accepted Answer

A)  purines and pyrimidines exist in a 1:1 ratio; DNA is helical 
B)  phosphates are stacked liked rungs on a ladder; DNA is helical 
C)  DNA is helical; DNA is the genetic material 
D)  DNA is helical; the flat nucleotide bases are stacked upon each other 
E)  the flat nucleotide bases are stacked upon each other; DNA is helical. 
A)  purines and pyrimidines exist in a 1:1 ratio; DNA is helical 
B)  phosphates are stacked liked rungs on a ladder; DNA is helical 
C)  DNA is helical; DNA is the genetic material 
D)  DNA is helical; the flat nucleotide bases are stacked upon each other 
E)  the flat nucleotide bases are stacked upon each other; DNA is helical.

Question 19

Explain why proteins were initially hypothesized to be the genetic material instead of DNA.

Accepted Answer

Genes were known to control the synthesi

Question 20

If you consider a DNA molecule to resemble a twisted ladder, the rungs of the ladder are paired nitrogen bases . 
__________________

Accepted Answer

A) True 
 B)False

Exam 12: Dna the Carrier of Genetic Information

Which of the following statements is FALSE with regard to DNA replication?

In replication, once the DNA strands have been separated, reformation of the double helix is prevented by:

Replication typically occurs at a single origin(s) of replication in eukaryotic chromosomes.

An RNA primer is synthesized by RNA primase . __________________

How does the degradation of telomeres result in cellular aging?

Figure 12-1 The chemical group in box 5 of the accompanying figure is a:

According to Chargaff's rules:

Errors in DNA replication can come from:

Hydrogen bonds can form between guanine and ____, and between adenine and ____.

Figure 12-1 The chemical group box 1 in the accompanying figure is a:

What allows each strand of DNA to serve as a template for a new DNA strand during replication?

DNA:

Enzymes called ____ form breaks in the DNA molecules to prevent the formation of knots in the DNA helix during replication.

The bacteriophages used in Alfred Hershey's and Martha Chase's experiments showed that:

Compare and contrast DNA synthesis in prokaryotes and eukaryotes.

DNA Pol III catalyzes the addition of successive nucleotides to the 5' end of a growing polynucleotide chain. __________________

Which of the following causes the unwinding of the DNA double helix?

From the DNA X-ray crystallography data, Franklin and Wilkins inferred that ____ while Watson and Crick determined that ____.

Explain why proteins were initially hypothesized to be the genetic material instead of DNA.

If you consider a DNA molecule to resemble a twisted ladder, the rungs of the ladder are paired nitrogen bases . __________________

A View of Life

Atoms and Molecules the Chemical Basis of Life

The Chemistry of Life Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp Energy-Releasing Pathways

Photosynthesis Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure Growth and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function an Introduction

Protection Support and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

Hydrogen bonds can form between guanine and , and between adenine and .

From the DNA X-ray crystallography data, Franklin and Wilkins inferred that while Watson and Crick determined that .