A mutation in the lac operator that blocks the binding of the lac repressor [all of the following EXCEPT]:

Question

Quizplus · Accepted Answer

A mutation in the lac operator that blocks the binding of the lac repressor causes constitutive expression of the lac operon genes (including the z and y genes) because the repressor can no longer bind to the operator to inhibit transcription. This mutation does not lead to an inactivation of the lac repressor protein itself; the repressor is still functional but cannot bind to the mutated operator.

A Mutation in the Lac Operator That Blocks the Binding