Question

a protein that regulates transcription by binding to the operator is known as the
multiple choice
promoter.
repressor.
operon.
operator.
cap.

Explanation:

In gene regulation, a repressor protein binds to the operator region of DNA to prevent transcription of genes in an operon. A promoter is a DNA - binding site for RNA polymerase, an operon is a unit of DNA containing a cluster of genes under the control of a single promoter and operator, the operator is a DNA sequence to which regulatory proteins bind, and CAP (catabolite activator protein) is involved in positive regulation.

Answer:

B. repressor