Suppose That There Is a Mutation in the Lac Operon

Multiple Choice

Suppose that there is a mutation in the lac operon that prevents the repressor from binding to the operator.In the absence of lactose (or allolactose) ,the genes of the operon will be _______.In the presence of lactose (or allolactose) ,the genes will be _______.

A) on;on
B) on;off
C) off;on
D) off;off
E) None of the above;in both cases the presence or absence of the corepressor would dictate whether the genes are on or off.