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Operators

APBIO-KRBVE3

In a typical bacterial operon, which of the following describes where an operator is located to prevent transcription?

A

Upstream of (before) the gene and the region of the promoter where RNA polymerase attaches.

B

Downstream of (after) the gene and the region of the promoter where RNA polymerase attaches.

C

At the location where the RNA polymerase attaches.

D

Between the gene and the region of the promoter where RNA polymerase attaches.