Biology (11th Edition)

Published by McGraw-Hill Education
ISBN 10: 1-25918-813-2
ISBN 13: 978-1-25918-813-8

Chapter 16 - Control of Gene Expression - Review Questions - Apply: 1

Answer

C.

Work Step by Step

These three proteins all can bind both DNA and an effector molecule, though not necessarily at the same time, depending on which protein you're looking at (C.). A. and B. are incorrect since not all three of the proteins mentioned are negative or positive regulators, and D. can be eliminated since these don't bind to proteins.
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