Question 1

What chemical force must be overcome in order to separate the two DNA strands during replication?

Accepted Answer

A)   hydrophobic interactions
B)   intrastrand folding
C)   ionic bonds
D)   phosphodiester bonds
E)   hydrogen bonds DNA helicase helps to disrupt the hydrogen bonds between base pairs that hold the two strands together.F) A) and D)
G) A) and C)

Question 2

During the elongation cycle of translation, the A site on a ribosome functions in

Accepted Answer

A)   receiving a new tRNA with the correct amino acid.
B)   holding a polypeptide as amino acids are added.
C)   attaching the small subunits of rRNA to the large subunit.
D)   releasing the completed polypeptide.
E)   processing the rRNA. During the elongation cycle, an incoming tRNA carrying the specified amino acid binds to the anticodon of the mRNA at the A site of the ribosome.F) B) and D)
G) A) and C)

Question 3

RNA differs from DNA because RNA

Accepted Answer

A)   is double-stranded, whereas DNA is not.
B)   may double back and base pair with itself, whereas DNA does not.
C)   is never single-stranded, whereas DNA may or may not be.
D)   can self-replicate, whereas DNA replication requires enzymes.
E)   is replicated along with DNA but does not require strand separation like DNA does.F) B) and C)
G) B) and E)

Question 4

Prokaryotes regulate gene expression with a promoter.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following enzymes is needed to reseal breaks in the sugar-phosphate backbone during replication?

Accepted Answer

A)   DNA polymerase
B)   RNA polymerase
C)   RNA ligase
D)   helicase
E)   DNA ligase DNA ligase reseals breaks in the sugar-phosphate backbone of DNA.F) C) and D)
G) A) and D)

Question 6

Prokaryotes cannot regulate gene expression at which of the following levels?

Accepted Answer

A)   mRNA transcription and mRNA translation
B)   mRNA translation
C)   alternative mRNA processing and chromatin compaction
D)   mRNA translation and longevity of mRNA
E)   mRNA transcription and longevity of mRNAF) B) and C)
G) B) and D)

Question 7

Which of the following events in gene expression control does not occur in the nucleus?

Accepted Answer

A)   chromatin condensation
B)   mRNA translation
C)   DNA transcription
D)   mRNA processing
E)   transcription factor bindingF) B) and C)
G) A) and E)

Question 8

The three steps that are required for DNA replication are

Accepted Answer

A)   unwinding, complementary base pairing, and joining.
B)   base doubling, unwinding, and joining.
C)   complementary base pairing, transcription, and translation.
D)   unwinding, transcription, and translation.
E)   unwinding, base doubling, and base pairing. In DNA replication, the DNA is first unwound by helicase. Then, new complementary nucleotides are positioned by complementary base pairing to each strand. The new nucleotides are then joined into a new strand.F) A) and C)
G) D) and E)

Question 9

Failure to remove introns from a primary mRNA would most likely cause

Accepted Answer

A)   irregularities in transcription.
B)   abnormal translation.
C)   DNA to mutate.
D)   DNA replication to fail.
E)   transcription to terminate early. The exons of a eukaryotic primary mRNA contain the protein coding region of the gene, and thus the introns must be removed during primary mRNA splicing so that a usable message is obtained. If they are not removed, the protein that would result from translating the mRNA will be altered.F) A) and E)
G) A) and D)

Question 10

Heterochromatin differs from euchromatin in that heterochromatin

Accepted Answer

A)   is transcriptionally active, whereas euchromatin is not.
B)   is not found in Barr bodies.
C)   is transcriptionally inactive.
D)   is the result of the unpacking of euchromatin.
E)   contains DNA with accessible promoters. Heterochromatin is highly condensed chromatin that is transcriptionally inactive, because promoters are inaccessible to RNA polymerase. When it is unpacked, it becomes euchromatin.F) A) and E)
G) A) and D)

Question 11

In eukaryotes, one gene may specify the construction of several proteins.

Accepted Answer

A) True 
 B)False

Exam 11: DNA Biology and Technology

Prokaryotes regulate gene expression with a promoter.

Correct Answer
verified

In eukaryotes, one gene may specify the construction of several proteins.

Correct Answer
verified

What chemical force must be overcome in order to separate the two DNA strands during replication?

Correct Answer
verified

Failure to remove introns from a primary mRNA would most likely cause

Correct Answer
verified

Which of the following events in gene expression control does not occur in the nucleus?

Correct Answer
verified

The three steps that are required for DNA replication are

Correct Answer
verified

During the elongation cycle of translation, the A site on a ribosome functions in

Correct Answer
verified

Which of the following enzymes is needed to reseal breaks in the sugar-phosphate backbone during replication?

Correct Answer
verified

Prokaryotes cannot regulate gene expression at which of the following levels?

Correct Answer
verified

Heterochromatin differs from euchromatin in that heterochromatin

Correct Answer
verified

RNA differs from DNA because RNA

Correct Answer
verified

Exam 11: DNA Biology and Technology

Prokaryotes regulate gene expression with a promoter.

Correct AnswerverifiedShow Answer

In eukaryotes, one gene may specify the construction of several proteins.

Correct AnswerverifiedShow Answer

What chemical force must be overcome in order to separate the two DNA strands during replication?

Correct AnswerverifiedShow Answer

Failure to remove introns from a primary mRNA would most likely cause

Correct AnswerverifiedShow Answer

Which of the following events in gene expression control does not occur in the nucleus?

Correct AnswerverifiedShow Answer

The three steps that are required for DNA replication are

Correct AnswerverifiedShow Answer

During the elongation cycle of translation, the A site on a ribosome functions in

Correct AnswerverifiedShow Answer

Which of the following enzymes is needed to reseal breaks in the sugar-phosphate backbone during replication?

Correct AnswerverifiedShow Answer

Prokaryotes cannot regulate gene expression at which of the following levels?

Correct AnswerverifiedShow Answer

Heterochromatin differs from euchromatin in that heterochromatin

Correct AnswerverifiedShow Answer

RNA differs from DNA because RNA

Correct AnswerverifiedShow Answer

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Correct Answer
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