Campbell Biology (11th Edition)

Published by Pearson
ISBN 10: 0-13409-341-0
ISBN 13: 978-0-13409-341-3

Chapter 9 - Test Your Understanding - Level 2 - Application/Analysis - Page 186: 9


Fig. 7.17 shows ATP being used up to move protons against a gradient (active transport) while Fig. 9.14 shows the opposite, the production of ATP powered by the passive movement of protons down their concentration gradient.

Work Step by Step

This can be seen both in the figures listed in the question as well as from a comparison of the associated text-- pay attention to whether ATP is being used or made and whether protons are moving with or against their existing gradient.
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