Question 1

Six complete cycles of PCR should result in a _______-fold increase in the amount of DNA.
a. 6
b. 12
c. 32
d. 64
e. 128

Accepted Answer

The answer of Six complete cycles of PCR should result...

Question 2

Recall that two hydrogen bonds bind A and T, but three hydrogen bonds bind G and C.Since the stability of DNA is affected by the number of hydrogen bonds, with more bonds promoting more stability, which of the following double-stranded DNA molecules would likely have the greatest stability?

Accepted Answer

A)   A molecule with 20 percent A
B)   A molecule with 26 percent G
C)   A molecule with 32 percent C
D)   A molecule with 38 percent T
E)   More information is required to answer the question.

Question 3

Within a double-stranded DNA molecule, an A on one strand is paired with a G on the other.Which DNA repair system would most likely fix this error?

Accepted Answer

A)   Proofreading
B)   Excision
C)   Ligase
D)   Mismatch
E)   Template

Question 4

Which type of DNA repair system can repair errors in single-stranded DNA?

Accepted Answer

A)   Excision
B)   Mismatch
C)   Proofreading
D)   Polymerase
E)   None of the above

Question 5

In PCR, the temperature is lowest when

Accepted Answer

A)   DNA is separated into two strands.
B)   primers anneal with the template.
C)   DNA polymerase is producing new strands of DNA.
D)   DNA is being repaired.
E)   the temperature is the same during all of the stages of PCR.

Question 6

Which statement about telomerase is true?

Accepted Answer

A)   It prevents the ends of chromosomes from continuing to grow.
B)   It prevents the ends of chromosomes from being eroded with each round of DNA replication.
C)   It makes DNA repair possible.
D)   It is necessary for the formation of Okazaki fragments.
E)   It is necessary for the formation of hydrogen bonds between complementary bases.

Question 7

Which statement about Okazaki fragments is true?

Accepted Answer

A)   They occur because DNA polymerase operates in only one direction along a strand of DNA.
B)   They act as a primer that initiates DNA replication.
C)   If they did not exist, the ends of chromosomes would get shorter with every replication.
D)   It they did not exist, bases would pair with their complementary bases.
E)   They reduce the mutation rate during DNA replication.

Question 8

Refer to the figure.  Which structure illustrates a replication fork?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E

Question 9

Four rounds of PCR will result in _______ molecules of DNA from a single molecule.

Accepted Answer

The answer of Four rounds of PCR will result in...

Question 10

Mammalian _______ is the eukaryotic equivalent of bacterial transformation.

Accepted Answer

The answer of Mammalian _______ is the eukaryotic equivalent of...

Question 11

A researcher would like to radioactively label DNA for an experiment.Which type of molecule could not serve as a target for radioactive labeling?

Accepted Answer

A)   Purines
B)   Ribose sugars
C)   Phosphates
D)   Sulfur
E)   Nitrogenous bases

Question 12

Which DNA repair system or mechanism acts as the second line of defense against mutational error that occurs as the result of DNA replication?

Accepted Answer

A)   Excision
B)   Mismatch
C)   Proofreading
D)   Telomerase
E)   Ligation

Question 13

In order to show that DNA in cell extracts is responsible for genetic transformation in Streptococcus pneumoniae, important corroborating evidence should indicate that _______ also destroy transforming activity.
a. enzymes that hydrolyze proteins
b. enzymes that hydrolyze DNA
c. enzymes that hydrolyze polysaccharides
d. temperatures high enough to kill cells
e. enzymes that hydrolyze RNA

Accepted Answer

The answer of In order to show that DNA in...

Question 14

In DNA replication, on the _______, the exposed DNA 3 end gets farther and farther away from the fork as replication proceeds.

Accepted Answer

A)   leading strand
B)   lagging strand
C)   Okazaki fragments
D)   primer
E)   sliding DNA clamp

Question 15

The Hershey and Chase blender experiment was designed to

Accepted Answer

A)   prove that DNA is found in the nucleus.
B)   test isotope labeling of DNA and proteins.
C)   disprove that DNA is the genetic molecule.
D)   identify the genetic material in bacteriophage T2.
E)   develop a DNA isolation method.

Question 16

Suppose proteins, and not DNA, were the genetic material in bacteriophage T2.What would we expect to find in the host cells in the Hershey and Chase blender experiment?

Accepted Answer

A)   Most of the labeled S
B)   Most of the labeled P
C)   Both labeled S and labeled P, with S more prevalent than P
D)   Both labeled S and labeled P, with P more prevalent than S
E)   Neither labeled S nor labeled P

Question 17

What enables the specificity of PCR?

Accepted Answer

A)   A heat-tolerant DNA polymerase
B)   The use of particular buffers
C)   The use of particular primers
D)   The ratios of dNTPs used
E)   The high temperature used to denature DNA

Question 18

Explain the ways that DNA polymerase participates in maintaining the fidelity of the DNA.

Accepted Answer

DNA polymerase participates in...

Question 19

The MLH1 protein dimerizes with the PMS2 protein to form a complex that is involved in the correction of errors of DNA replication.Loss-of-function mutations in the genes that encode for these proteins increase the incidence of colon cancer.Which type of DNA error would be repaired by the activity of this complex?

Accepted Answer

A)   Mismatched bases
B)   Chemically induced damage to nucleotides
C)   Thymine dimers
D)   Radiation-induced damage to nucleotides
E)   All types of DNA errors

Question 20

The enzyme that restores the phosphodiester linkage between adjacent fragments in the lagging strand during DNA replication is

Accepted Answer

A)   DNA ligase.
B)   primase.
C)   reverse transcriptase.
D)   helicase.
E)   DNA polymerase I.

Exam 13: Dna and Its Role in Heredity

Correct Answer
verified

Which DNA repair system or mechanism acts as the second line of defense against mutational error that occurs as the result of DNA replication?

Correct Answer
verified

In DNA replication, on the _______, the exposed DNA 3 end gets farther and farther away from the fork as replication proceeds.

Correct Answer
verified

Mammalian _______ is the eukaryotic equivalent of bacterial transformation.

Correct Answer
verified

Four rounds of PCR will result in _______ molecules of DNA from a single molecule.

Correct Answer
verified

Suppose proteins, and not DNA, were the genetic material in bacteriophage T2.What would we expect to find in the host cells in the Hershey and Chase blender experiment?

Correct Answer
verified

Which statement about Okazaki fragments is true?

Correct Answer
verified

Six complete cycles of PCR should result in a _______-fold increase in the amount of DNA. a. 6 b. 12 c. 32 d. 64 e. 128

Correct Answer
verified

What enables the specificity of PCR?

Correct Answer
verified

Recall that two hydrogen bonds bind A and T, but three hydrogen bonds bind G and C.Since the stability of DNA is affected by the number of hydrogen bonds, with more bonds promoting more stability, which of the following double-stranded DNA molecules would likely have the greatest stability?

Correct Answer
verified

The Hershey and Chase blender experiment was designed to

Correct Answer
verified

Refer to the figure. Which structure illustrates a replication fork?

Correct Answer
verified

Correct Answer
verified

Within a double-stranded DNA molecule, an A on one strand is paired with a G on the other.Which DNA repair system would most likely fix this error?

Correct Answer
verified

Which type of DNA repair system can repair errors in single-stranded DNA?

Correct Answer
verified

A researcher would like to radioactively label DNA for an experiment.Which type of molecule could not serve as a target for radioactive labeling?

Correct Answer
verified

In PCR, the temperature is lowest when

Correct Answer
verified

Explain the ways that DNA polymerase participates in maintaining the fidelity of the DNA.

Correct Answer
verified
DNA polymerase participates in...
View Answer

Which statement about telomerase is true?

Correct Answer
verified

The enzyme that restores the phosphodiester linkage between adjacent fragments in the lagging strand during DNA replication is

Correct Answer
verified

Exam 13: Dna and Its Role in Heredity

Correct AnswerverifiedShow Answer

Which DNA repair system or mechanism acts as the second line of defense against mutational error that occurs as the result of DNA replication?

Correct AnswerverifiedShow Answer

In DNA replication, on the _______, the exposed DNA 3 end gets farther and farther away from the fork as replication proceeds.

Correct AnswerverifiedShow Answer

Mammalian _______ is the eukaryotic equivalent of bacterial transformation.

Correct AnswerverifiedShow Answer

Four rounds of PCR will result in _______ molecules of DNA from a single molecule.

Correct AnswerverifiedShow Answer

Suppose proteins, and not DNA, were the genetic material in bacteriophage T2.What would we expect to find in the host cells in the Hershey and Chase blender experiment?

Correct AnswerverifiedShow Answer

Which statement about Okazaki fragments is true?

Correct AnswerverifiedShow Answer

Six complete cycles of PCR should result in a _______-fold increase in the amount of DNA. a. 6 b. 12 c. 32 d. 64 e. 128

Correct AnswerverifiedShow Answer

What enables the specificity of PCR?

Correct AnswerverifiedShow Answer

Recall that two hydrogen bonds bind A and T, but three hydrogen bonds bind G and C.Since the stability of DNA is affected by the number of hydrogen bonds, with more bonds promoting more stability, which of the following double-stranded DNA molecules would likely have the greatest stability?

Correct AnswerverifiedShow Answer

The Hershey and Chase blender experiment was designed to

Correct AnswerverifiedShow Answer

Refer to the figure. Which structure illustrates a replication fork?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Within a double-stranded DNA molecule, an A on one strand is paired with a G on the other.Which DNA repair system would most likely fix this error?

Correct AnswerverifiedShow Answer

Which type of DNA repair system can repair errors in single-stranded DNA?

Correct AnswerverifiedShow Answer

A researcher would like to radioactively label DNA for an experiment.Which type of molecule could not serve as a target for radioactive labeling?

Correct AnswerverifiedShow Answer

In PCR, the temperature is lowest when

Correct AnswerverifiedShow Answer

Explain the ways that DNA polymerase participates in maintaining the fidelity of the DNA.

Correct AnswerverifiedDNA polymerase participates in...View AnswerShow Answer

Which statement about telomerase is true?

Correct AnswerverifiedShow Answer

The enzyme that restores the phosphodiester linkage between adjacent fragments in the lagging strand during DNA replication is

Correct AnswerverifiedShow Answer

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verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
DNA polymerase participates in...
View Answer

Correct Answer
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Correct Answer
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