When __________ interacts with RNA polymerase, it increases the rate of transcription initiation of the lac operon.
A) LacI protein
B) cAMP receptor protein
C) lactose
D) allolactose
E) glucose

Question

Quizplus · Accepted Answer

The cAMP receptor protein (CRP) interacts with RNA polymerase at the lac operon and increases the rate of transcription initiation in the presence of cAMP. When glucose is absent and lactose is present, the lac operon is activated by binding of allolactose to LacI protein, which releases its repression of the operon. However, the rate of transcription is further increased by the binding of CRP.

When __________ Interacts with RNA Polymerase, It Increases the Rate