Question 20 In positive control of an operon, which of the following mechanisms typically enhances gene expression? A Binding of an activator protein to a site near the promoter. B The presence of a repressor that competes with RNA polymerase. C Inhibition of transcription by small RNA molecules. D Methylation of DNA sequences near the promoter. 0.5 Points

          Question 20
In positive control of an operon, which of the following mechanisms typically enhances gene expression?
A Binding of an activator protein to a site near the promoter.
B The presence of a repressor that competes with RNA polymerase.
C Inhibition of transcription by small RNA molecules.
D Methylation of DNA sequences near the promoter.
0.5 Points

Question 20
In positive control of an operon, which of the following mechanisms typically enhances gene expression?
A Binding of an activator protein to a site near the promoter.
B The presence of a repressor that competes with RNA polymerase.
C Inhibition of transcription by small RNA molecules.
D Methylation of DNA sequences near the promoter.
0.5 Points

Added by Margaret B.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

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Solved by Expert Joanna Quigley

01/30/2022

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Step 1: Positive control of an operon means that the operon is turned on by the presence of an activator protein. Show more…

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Question 20 In positive control of an operon, which of the following mechanisms typically enhances gene expression? A Binding of an activator protein to a site near the promoter. B The presence of a repressor that competes with RNA polymerase. C Inhibition of transcription by small RNA molecules. D Methylation of DNA sequences near the promoter. 0.5 Points