What would occur if the repressor of an inducible operon were mutated so it could not bind the operator?
A) irreversible binding of the repressor to the promoter
B) reduced transcription of the operon's genes
C) buildup of a substrate for the pathway controlled by the operon
D) continuous transcription of the operon's genes
E) overproduction of catabolite activator protein (CAP)

Question

Quizplus · Accepted Answer

If the repressor of an inducible operon could not bind the operator, it would result in continuous transcription of the operon's genes. This is because the repressor is responsible for blocking RNA polymerase from binding to the promoter and initiating transcription. In the absence of a functional repressor, RNA polymerase would bind to the promoter and transcribe the operon's genes without any regulatory control.

What Would Occur If the Repressor of an Inducible Operon