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 - Understand: 7



Work Step by Step

B. states the correct working of the trp repressor protein, while A. directly contradicts it. C. includes both A. and B. and is wrong because it includes A. D. is incorrect because the cell makes tryptophan whether or not it needs it if there is none present.
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