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 - Understand: 2

Answer

B.

Work Step by Step

Signal transduction pathways taken an extracellular signal, receive it externally or internally, and then pass the information throughout the cell--what B. says. C. can be excluded since it is the opposite of B., and A. is referring to one potential part of a pathway, not the whole. D. is wrong because it excludes the majority of pathways for which the signal is perceived externally by a cell surface receptor protein.
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