The repressor protein in the lac operon binds to

Question

Quizplus · Accepted Answer

The lac operon repressor protein binds to the operator region of the DNA in the absence of lactose or its inducer, allolactose. This binding prevents RNA polymerase from binding to the promoter region of the operon and transcribing the genes involved in lactose metabolism. When lactose or allolactose is present, it binds to the repressor protein and alters its conformation in such a way that the protein can no longer bind to the operator, allowing RNA polymerase to transcribe the genes. Therefore, the repressor protein binds to the operator in order to control gene expression in the lac operon.

The Repressor Protein in the Lac Operon Binds to