Question 1

The step in DNA replication in which two replication forks moving in opposite directions may meet is called

Accepted Answer

A)  initiation. 
B)  elongation. 
C)  termination. 
D)  translation. 
E)  translocation. 
A)  initiation. 
B)  elongation. 
C)  termination. 
D)  translation. 
E)  translocation. C

Question 2

If DNA replication were conservative or dispersive (instead of semiconservative),what would be the results of the Meselson-Stahl experiment?

Accepted Answer

In the conservative model,there would still be two bands,but the lower band would be at a position consistent with a molecule consisting entirely of ¹⁵N,rather than being at an intermediate position consistent with equal parts ¹⁵N and ¹⁴N.In the case of dispersive replication,there would be many bands distributed between the position of bands consisting of entirely ¹⁵N labelled DNA and ¹⁴N labelled DNA.

Question 3

The complementary sequence of 5' AATTCGCTTA 3' is

Accepted Answer

A)  5' AATTCGCTTA 3'. 
B)  3' AATTCGCTTA 5'. 
C)  5' TAACGCTTAA 3'. 
D)  5' TAAGCGAATT 3'. 
E)  3' TAAGCGAATT 5'. 
A)  5' AATTCGCTTA 3'. 
B)  3' AATTCGCTTA 5'. 
C)  5' TAACGCTTAA 3'. 
D)  5' TAAGCGAATT 3'. 
E)  3' TAAGCGAATT 5'. D

Question 4

Crick said that "DNA is,at bottom,a much less sophisticated molecule than a highly evolved protein and for this reason reveals its secrets more easily." How is DNA less complex than protein?

Accepted Answer

Protein is a polymer of at least 23 diff

Question 5

Accuracy of replication is enhanced by the redundancy of DNA,enzymatic repair of damaged DNA,and the remarkable precision of the cellular replication machinery.

Accepted Answer

A) True 
 B)False

Question 6

Briefly describe the role of an initiator protein in DNA replication.

Accepted Answer

The initiator protein is the first prote

Question 7

Each nucleotide of DNA contains

Accepted Answer

A)  a deoxyribose sugar. 
B)  a nitrogenous base. 
C)  a phosphate. 
D)  all of the choices are correct. 
E)  a phospholipid 
A)  a deoxyribose sugar. 
B)  a nitrogenous base. 
C)  a phosphate. 
D)  all of the choices are correct. 
E)  a phospholipid

Question 8

During the S phase of interphase,the state of the DNA can be described as

Accepted Answer

A)  a single continuous linear double helix. 
B)  a double helix replicated semiconservatively. 
C)  a double helix replicated conservatively. 
D)  a triple helix replicated semiconservatively. 
E)  None of the choices are correct. 
A)  a single continuous linear double helix. 
B)  a double helix replicated semiconservatively. 
C)  a double helix replicated conservatively. 
D)  a triple helix replicated semiconservatively. 
E)  None of the choices are correct.

Question 9

What radiolabelled substance did Hershey and Chase use to label the protein component of the bacteriophage in their study to determine whether protein or DNA was necessary for phage production?

Accepted Answer

A)  nitrogen 
B)  carbon 
C)  sulphur 
D)  phosphorus 
E)  iodide 
A)  nitrogen 
B)  carbon 
C)  sulphur 
D)  phosphorus 
E)  iodide

Question 10

Which of the following is not involved in ensuring the accuracy of a cell's genetic information?

Accepted Answer

A)  redundancy 
B)  repair enzymes 
C)  precision of replication machinery 
D)  DNA polymerase proofreading mechanism 
E)  transformation 
A)  redundancy 
B)  repair enzymes 
C)  precision of replication machinery 
D)  DNA polymerase proofreading mechanism 
E)  transformation

Question 11

During the DNA replication process,RNA primers are removed and replaced with DNA.Briefly state why it is important that this RNA be replaced with DNA.

Accepted Answer

RNA is more unstable than DNA

Question 12

How many replication forks depart from an origin of replication?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  four 
E)  None of the choices are correct. 
A)  one 
B)  two 
C)  three 
D)  four 
E)  None of the choices are correct.

Question 13

The step in DNA replication in which the replication proteins open up the double helix and prepare for complementary base-pairing is called

Accepted Answer

A)  initiation. 
B)  elongation. 
C)  termination. 
D)  translation. 
E)  translocation. 
A)  initiation. 
B)  elongation. 
C)  termination. 
D)  translation. 
E)  translocation.

Question 14

Which of the following is not true of naturally occurring DNA?

Accepted Answer

A)  it can be circular 
B)  it forms a right-handed helix 
C)  it contains hydrogen bonds 
D)  it contains ribose 
E)  it contains covalent bonds 
A)  it can be circular 
B)  it forms a right-handed helix 
C)  it contains hydrogen bonds 
D)  it contains ribose 
E)  it contains covalent bonds

Question 15

Why are DNA molecules considered redundant?

Accepted Answer

Either strand of the

Question 16

DNA has a highly negative charge throughout the molecule and therefore has no polarity.

Accepted Answer

A) True 
 B)False

Question 17

X-ray data showed that the DNA helix undergoes one complete turn every

Accepted Answer

A)  2.0 angstroms. 
B)  3.4 angstroms. 
C)  20 angstroms. 
D)  34 angstroms. 
E)  None of the choices are correct. 
A)  2.0 angstroms. 
B)  3.4 angstroms. 
C)  20 angstroms. 
D)  34 angstroms. 
E)  None of the choices are correct.

Question 18

A phosphodiester bond joins one nucleotide to another in the DNA polymer.

Accepted Answer

A) True 
 B)False

Question 19

Transformation in bacteria results from the uptake of foreign DNA.

Accepted Answer

A) True 
 B)False

Question 20

During complementary base-pairing,enzymes join the base's nucleotide to the preceding nucleotide by a(n)__________ bond.

Accepted Answer

A)  hydrogen 
B)  ionic 
C)  phosphodiester 
D)  electrostatic 
E)  None of the choices are correct. 
A)  hydrogen 
B)  ionic 
C)  phosphodiester 
D)  electrostatic 
E)  None of the choices are correct.

Exam 4: Linkage, Recombination, and the Mapping of Genes on Chromosomes

The step in DNA replication in which two replication forks moving in opposite directions may meet is called

If DNA replication were conservative or dispersive (instead of semiconservative),what would be the results of the Meselson-Stahl experiment?

The complementary sequence of 5' AATTCGCTTA 3' is

Crick said that "DNA is,at bottom,a much less sophisticated molecule than a highly evolved protein and for this reason reveals its secrets more easily." How is DNA less complex than protein?

Accuracy of replication is enhanced by the redundancy of DNA,enzymatic repair of damaged DNA,and the remarkable precision of the cellular replication machinery.

Briefly describe the role of an initiator protein in DNA replication.

Each nucleotide of DNA contains

During the S phase of interphase,the state of the DNA can be described as

What radiolabelled substance did Hershey and Chase use to label the protein component of the bacteriophage in their study to determine whether protein or DNA was necessary for phage production?

Which of the following is not involved in ensuring the accuracy of a cell's genetic information?

During the DNA replication process,RNA primers are removed and replaced with DNA.Briefly state why it is important that this RNA be replaced with DNA.

How many replication forks depart from an origin of replication?

The step in DNA replication in which the replication proteins open up the double helix and prepare for complementary base-pairing is called

Which of the following is not true of naturally occurring DNA?

Why are DNA molecules considered redundant?

DNA has a highly negative charge throughout the molecule and therefore has no polarity.

X-ray data showed that the DNA helix undergoes one complete turn every

A phosphodiester bond joins one nucleotide to another in the DNA polymer.

Transformation in bacteria results from the uptake of foreign DNA.

During complementary base-pairing,enzymes join the base's nucleotide to the preceding nucleotide by a(n)__________ bond.

Mendels Principles of Heredity

Extensions to Mendels Laws

The Chromosome Theory of Inheritance

Dna Structure, Replication, and Recombination

Anatomy and Function of a Gene: Dissection Through Mutation

Gene Expression: the Flow of Information From Dna to Rna to Protein

Digital Analysis of Genomes

Genome Annotation

Analyzing Genomic Variation

The Eukaryotic Chromosome

Chromosomal Rearrangements and Changes in Chromosome Number

Bacterial Genetics

Organellar Inheritance

Gene Regulation in Prokaryotes

Gene Regulation in Eukaryotes

Manipulating the Genomes of Eukaryotes

The Genetic Analysis of Development

The Genetics of Cancer

Variation and Selection in Populations

Genetics of Complex Traits

Exploring Synthetic Biology: Concepts, Techniques, and Applications

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