When more than one operon is under the control of a single regulatory protein, the operons are collectively called a(n)
A) regulon.
B) operator.
C) autoinducer.
D) riboswitch.

Question

Quizplus · Accepted Answer

When a single regulatory protein controls multiple operons, it is known as a regulon. Therefore, the correct answer is A. An operator is a DNA sequence that acts as a binding site for a regulatory protein, and an autoinducer is a small signaling molecule that regulates gene expression. A riboswitch is a specialized RNA molecule that can bind to a small molecule and alter gene expression. None of these terms describe a situation where multiple operons are controlled by a single regulatory protein.

When More Than One Operon Is Under the Control of a Single