What is the function of the operator in an operon

A. Provide a site on the DNA where the repressor can bind and stop transcription

B. Provide a site on the DNA where RNA polymerase can bind to begin transcription

C. Code for the repressor protein

D. Code for the RNA polymerase protein

The answer is; A

The operator site is usually associated with the promoter region of the operon. This region is bound by a repressor. The repressor acts as a physical barrier so the RNA polymerase does not bind to its promoter, or even if it binds, does not proceed to transcribe the genes.

1. C

2. C

3. B

4. A