Which statement is false about operons that have the feature of catabolic repression?
A)Several different multisubunit repressors can block the transcription of such an operon.
B)Operons with catabolic repression have characteristically weak promoters.
C)Their transcription is lowered in the presence of glucose.
D)Transcription of such an operon is increased as the concentration of cAMP increases.

Question

Quizplus · Accepted Answer

Catabolic repression, often exemplified by the lac operon in E. coli, does not typically involve multisubunit repressors to block transcription. Instead, it involves a regulatory mechanism where the presence of a preferred energy source (like glucose) inhibits the expression of genes involved in the metabolism of other, less preferred sources.

Which Statement Is False About Operons That Have the Feature