Question 1

The mechanism that allows chromatin exchange during meiosis in eukaryotes is ________.

Accepted Answer

homologous...

Question 2

________ are mobile genetic elements discovered in corn by Barbara McClintock.

Accepted Answer

Transposon...

Question 3

DNA contains thymine rather than uracil.Why is the presence of thymine in DNA advantageous? What effect would the presence of uracil in DNA have on DNA repair?

Accepted Answer

Deamination of cytosine result...

Question 4

At least one aspect of aging has been determined to be the shortening of ________ with each successive round of DNA replication.

Accepted Answer

The answer of At least one aspect of aging has...

Question 5

Ultraviolet (UV) light-treated bacteria would have increased DNA damage in the form of

Accepted Answer

A)  analog incorporation.
B)  pyrimidine dimer formation.
C)  intercalation of the bases.
D)  direct transition of the bases.
E)  deamination.F) A) and B)
G) C) and E)

Question 6

Why do eukaryotic chromosomes have multiple origins of replication? Design an experiment that allows you to test your hypothesis.

Accepted Answer

Multiple origin of replication sites all...

Question 7

Multiple sites of DNA replication along eukaryotic chromosomes are known as

Accepted Answer

A)  replicons.
B)  multireplication forks.
C)  helicase loaders.
D)  ARS elements.
E)  None of these answers are correct.F) C) and E)
G) B) and D)

Question 8

Composite transposons are composed of

Accepted Answer

A)  the transposase gene flanked by inverted repeat sequences.
B)  a mobile gene flanked by inverted repeat sequences.
C)  the transposase gene only.
D)  several genes,such as antibiotic resistance genes,flanked by transposase genes.
E)  several genes,including transposase,flanked by inverted repeat sequences.F) B) and E)
G) A) and B)

Question 9

An isolate of a mutant bacterium appears to grow more slowly than the wild-type population from which it was isolated.Further studies showed that the slower growth was due to a markedly reduced DNA polymerase I activity.From this information,one would expect that this organism would also be deficient in the activity of DNA

Accepted Answer

A)  excision repair.
B)  recombination.
C)  transcription.
D)  translation.
E)  unwinding.F) A) and D)
G) A) and C)

Question 10

The most common form of spontaneous replication error is

Accepted Answer

A)  tautomeric shift.
B)  double-stranded DNA breaks.
C)  thymine dimer addition.
D)  base analogue addition.
E)  DNA intercalation.F) D) and E)
G) A) and B)

Question 11

Base-modifying chemicals such as aflatoxin B1 or nitrosoguanidine cause mutations by

Accepted Answer

A)  increasing the likelihood of depurination.
B)  causing double-stranded breaks in the DNA sugar-phosphate backbone.
C)  causing mispairing during DNA replication.
D)  causing pyrimidine dimers.
E)  increasing the likelihood of depurination or causing mispairing during DNA replication.F) B) and C)
G) A) and C)

Question 12

Bypass polymerases that are more tolerant of DNA damage and can continue DNA synthesis at damaged sites produce a daughter strand that contains ________.

Accepted Answer

errors or mutations or more er...

Question 13

Double-stranded break repair mechanisms

Accepted Answer

A)  are error prone.
B)  may join nonhomologous ends of DNA together.
C)  are part of the SOS repair system.
D)  may use homologous DNA to repair the damage.
E)  are error prone and may join nonhomologous ends of DNA together or use homologous DNA to repair the damage.F) C) and D)
G) B) and E)

Exam 17: DNA Replication, repair, and Recombination

DNA contains thymine rather than uracil.Why is the presence of thymine in DNA advantageous? What effect would the presence of uracil in DNA have on DNA repair?

Correct Answer
verified
Deamination of cytosine result...
View Answer

Composite transposons are composed of

Correct Answer
verified

Why do eukaryotic chromosomes have multiple origins of replication? Design an experiment that allows you to test your hypothesis.

Correct Answer
verified
Multiple origin of replication sites all...
View Answer

Multiple sites of DNA replication along eukaryotic chromosomes are known as

Correct Answer
verified

Base-modifying chemicals such as aflatoxin B₁or nitrosoguanidine cause mutations by

Correct Answer
verified

Bypass polymerases that are more tolerant of DNA damage and can continue DNA synthesis at damaged sites produce a daughter strand that contains ________.

Correct Answer
verified
errors or mutations or more er...
View Answer

At least one aspect of aging has been determined to be the shortening of ________ with each successive round of DNA replication.

Correct Answer
verified

The mechanism that allows chromatin exchange during meiosis in eukaryotes is ________.

Correct Answer
verified
homologous...
View Answer

Ultraviolet (UV) light-treated bacteria would have increased DNA damage in the form of

Correct Answer
verified

________ are mobile genetic elements discovered in corn by Barbara McClintock.

Correct Answer
verified
Transposon...
View Answer

Correct Answer
verified

The most common form of spontaneous replication error is

Correct Answer
verified

Double-stranded break repair mechanisms

Correct Answer
verified

Exam 17: DNA Replication, repair, and Recombination

DNA contains thymine rather than uracil.Why is the presence of thymine in DNA advantageous? What effect would the presence of uracil in DNA have on DNA repair?

Correct AnswerverifiedDeamination of cytosine result...View AnswerShow Answer

Composite transposons are composed of

Correct AnswerverifiedShow Answer

Why do eukaryotic chromosomes have multiple origins of replication? Design an experiment that allows you to test your hypothesis.

Correct AnswerverifiedMultiple origin of replication sites all...View AnswerShow Answer

Multiple sites of DNA replication along eukaryotic chromosomes are known as

Correct AnswerverifiedShow Answer

Base-modifying chemicals such as aflatoxin B1 or nitrosoguanidine cause mutations by

Correct AnswerverifiedShow Answer

Bypass polymerases that are more tolerant of DNA damage and can continue DNA synthesis at damaged sites produce a daughter strand that contains ________.

Correct Answerverifiederrors or mutations or more er...View AnswerShow Answer

At least one aspect of aging has been determined to be the shortening of ________ with each successive round of DNA replication.

Correct AnswerverifiedShow Answer

The mechanism that allows chromatin exchange during meiosis in eukaryotes is ________.

Correct Answerverifiedhomologous...View AnswerShow Answer

Ultraviolet (UV) light-treated bacteria would have increased DNA damage in the form of

Correct AnswerverifiedShow Answer

________ are mobile genetic elements discovered in corn by Barbara McClintock.

Correct AnswerverifiedTransposon...View AnswerShow Answer

Correct AnswerverifiedShow Answer

The most common form of spontaneous replication error is

Correct AnswerverifiedShow Answer

Double-stranded break repair mechanisms

Correct AnswerverifiedShow Answer

Correct Answer
verified
Deamination of cytosine result...
View Answer

Correct Answer
verified

Correct Answer
verified
Multiple origin of replication sites all...
View Answer

Correct Answer
verified

Base-modifying chemicals such as aflatoxin B₁or nitrosoguanidine cause mutations by

Correct Answer
verified

Correct Answer
verified
errors or mutations or more er...
View Answer

Correct Answer
verified

Correct Answer
verified
homologous...
View Answer

Correct Answer
verified

Correct Answer
verified
Transposon...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified