Course

Introductory Biology

Study Pack

Set 18 Regulation Of Gene Expression

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Question 1

(Multiple Choice)

Free
In positive control of several sugar-metabolism-related operons, the catabolite activator protein (CAP)binds to DNA to stimulate transcription. What causes an increase in CAP?

A) increase in glucose and increase in cAMP
B) decrease in glucose and increase in cAMP
C) increase in glucose and decrease in cAMP
D) decrease in glucose and increase in repressor
E) decrease in glucose and decrease in repressor

Answer

Question 2

(Multiple Choice)

Free
Which of the following is a protein produced by a regulatory gene?

A) operon
B) inducer
C) promoter
D) repressor
E) corepressor

Answer

Question 3

(Multiple Choice)

Free
Which of the following mechanisms is (are)used to coordinate the expression of multiple, related genes in eukaryotic cells?

A) Genes are organized into clusters, with local chromatin structures influencing the expression of all the genes at once.
B) The genes share a common intragenic sequence, and allow several activators to turn on their transcription, regardless of location.
C) The genes are organized into large operons, allowing them to be transcribed as a single unit.
D) A single repressor is able to turn off several related genes.
E) Environmental signals enter the cell and bind directly to promoters.

Answer