E.coli lac operon control by CAP is:
A)negative inducible.
B)negative repressible.
C)positive inducible.
D)positive repressible.
E)both negative inducible and negative repressible.

Question

Quizplus · Accepted Answer

CAP (catabolite activator protein) is a positive regulatory protein that binds to the promoter region of the lac operon in the presence of cAMP (cyclic AMP). This binding enhances RNA polymerase activity, increasing transcription of the lac operon genes. Therefore, the control of the lac operon by CAP is positive inducible.

E.coli Lac Operon Control by CAP Is