Catabolite repression refers to the
A) increased transcription from many operons when glucose is present in the medium.
B) shutdown of transcription from many operons when glucose is present in the medium.
C) increased activity of inducers caused by glucose in the medium.
D) Both a and b
E) Both a and c

Question

Quizplus · Accepted Answer

Catabolite repression refers to the shutdown of transcription from many operons when glucose is present in the medium. This occurs because the presence of glucose leads to the activation of the catabolite activator protein (CAP), which binds to the promoter regions of genes involved in catabolic pathways and promotes transcription. In the absence of glucose, CAP is inactive and transcription is reduced.

Catabolite Repression Refers to the