When a structural gene is under positive inducible control, what would be the result of a mutation that eliminates the activator protein?
A)The structural gene would to be constitutively expressed due to the lack of inducible control.
B)The transcription of a structural gene will not be affected, as an activator is not required.
C)The mutation will lead to activation of a repressor upon the lack of an activator protein, which will block transcription.
D)As the transcription will require an activator protein, the transcription will be turned off.
E)More cAMP will be produced in a cell to compensate for the lack of an activator protein.

Question

Quizplus · Accepted Answer

In positive inducible control, the presence of an activator protein is necessary to initiate transcription. If a mutation eliminates the activator protein, the transcription of the structural gene cannot be initiated, leading to the gene being turned off.

When a Structural Gene Is Under Positive Inducible Control, What