Biology (11th Edition)

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

Chapter 9 - Cell Communication - Review Questions - Apply: 1



Work Step by Step

A. is wrong since steroids are not proteins and, thus, cannot be enzymes, and C. can be eliminated because steroid signalling usually acts directly on gene expression, not by making second messengers. D. is incorrect because steroids receptors don't work through G proteins.
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