In the lac operon, the repressor inhibits transcription when
a. t...

Question

In the lac operon, the repressor inhibits transcription when
a. the repressor is bound to the inducer.
b. the repressor is not bound to the inducer.
c. the repressor is bound to glucose.
d. the repressor is not bound to the operator.

Accepted Answer

Welcome back. Here's our next question. When the repressor binds to the operator, the transcription process is inhibited by preventing the blank from binding to the promoter region. So for transcription to take place it's the enzyme RNA polymerase that binds the promoter region and then carries out the addition of those RNA bases to the chain in transcription. So it's choice C. RNA polymerase, whose binding is prevented by a repressor. Let's look through our other choices to see why they are not the correct answer. Choice A says DNA polymerase. DNA preliminaries is involved in DNA replication, not transcription. So it's not the enzyme that's being walked here. Choice B is activator. The activator is the repressors opposite. It promotes RNA polymerase binding to the promoter, therefore stimulating transcription. So it's basically the opposite of the repressor. So it's not our answer. And then finally A. T. P. Is not what is carrying out that transcription. It is RNA polymerase instead. So again, when the repressor binds the operator, the transcription process is inhibited by preventing the choice C. RNA polymerase from binding to the promoter region. See you in the next video

In the lac operon, the repressor inhibits transcription when a. the repressor is bound to the inducer. b. the repressor is not bound to the inducer. c. the repressor is bound to glucose. d. the repressor is not bound to the operator.

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