Which of the following is a property of the lac operon?
A)Allolactose increases the effect of the repressor.
B)Lactose represses the lac operon.
C)It is negatively controlled via CAP.
D)It is negatively controlled via the lac repressor.

Question

Quizplus · Accepted Answer

The lac operon is negatively controlled by the lac repressor. When lactose is present in the environment, it binds to the repressor protein, causing a conformational change that prevents it from binding to the operator region. This allows RNA polymerase to transcribe the lac genes. The catabolite activator protein (CAP) is involved in positive control of the lac operon, not negative control. Allolactose is actually an inducer that binds to the lac repressor, allowing transcription to occur.

Which of the Following Is a Property of the Lac