Which Binds to the operator of the Lac Operon

Question

Which binds to the operator of the lac operon? A)permease B)repressor C)activator D)lactose E)beta galactosidase

Accepted Answer

The lac operon is regulated by the repressor protein, which binds to the operator region and blocks RNA polymerase from transcribing the genes involved in lactose metabolism. When lactose is present in the environment, it binds to the repressor protein and changes its conformation, causing it to release from the operator and allowing transcription to occur. Permease, activator, and beta galactosidase are all involved in lactose metabolism but do not directly bind to the operator.

Which binds to the operator of the lac operon?