A lacO^c mutant would A)never express lac structural genes. B)constitutively express the lac structural genes. C)not bind to lacI. D)use glucose before using lactose as a carbon and energy source. E)not bind to lacI and never express lac structural genes.

Question

Quizplus · Accepted Answer

A lacO^c mutant has a mutation in the operator site (O) that prevents the lac repressor (lacI) from binding. This means that the repressor cannot inhibit transcription of the lac operon, leading to constitutive expression of the lac structural genes regardless of the presence or absence of lactose.

A LacOc Mutant Would

A LacO^c Mutant Would