How do promoter mutations change the expression of the lac operon genes?
1)They change the inducibility of the lac operon.
2)They modify the levels of gene expression in the induced and uninduced state.
3)They change the frequency of initiation of lac operon transcription.
A) 1
B) 2
C) 3
D) 1 and 2
E) 2 and 3

Question

Quizplus · Accepted Answer

Promoter mutations can affect the binding affinity of RNA polymerase, thereby modifying the levels of gene expression in both the induced and uninduced states and changing the frequency of initiation of transcription of the lac operon.

How Do Promoter Mutations Change the Expression of the Lac