alleryThe lac operon is regulated by the lac repressor binding to the:
APromoter
BTerminator
CStructural gene z
DOperator region (adjacent to the promoter)
Answer & Solution
Correct answer: D. Operator region (adjacent to the promoter)
The **lac repressor** binds the **operator** (adjacent to the promoter).
When bound, it physically blocks RNA polymerase from transcribing the structural genes.
When inactivated by lactose, transcription proceeds.
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