Campbell Biology (10th Edition)

Published by Pearson
ISBN 10: 0321775651
ISBN 13: 978-0-32177-565-8

Chapter 9 - Test Your Understanding - Level 1 - Knowledge/Comprehension - Page 183: 3

Answer

A. Oxygen.

Work Step by Step

B is produced when oxygen accepts the electrons, and C is a product left after protons are given to the gradient used to generate ATP. D can be excluded since it is found in glycolysis, far before electron transport enters the picture.
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