What is the Likely Outcome from a Mutation in the LacO

Question

What is the likely outcome from a mutation in the lacO site (lac operator)of the lac operon?
A)Binding of RNA polymerase could be hindered,so transcription would be repressed.
B)Binding of a repressor protein could be hindered,so transcription would be active.
C)Binding of the activator protein could be hindered,so transcription would be repressed.
D)Binding of the sigma factor to RNA Polymerase would be hindered,so transcription would be represseD.
E)The order in which the genes of the lac operon are transcribed would be altered.

Accepted Answer

The lacO site is the operator region where the lac repressor binds. A mutation in this site could prevent the repressor from binding, thus allowing continuous transcription of the lac operon genes in the absence of repression.