Biochemistry
Biochemistry
6th Edition
ISBN: 9781305577206
Author: Reginald H. Garrett, Charles M. Grisham
Publisher: Cengage Learning
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Chapter 21, Problem 6P

Δ pH and Δ ψ in the Chloroplast Proton-Motive Force (Integrates with Chapter 20.) In mitochondria, the membrane potential ( Δ ψ ) contributes relatively more to Δ p (proton-motive force) than does the pH gradient ( Δ pH). The reverse is true in chloroplasts. Why do you suppose that the proton-motive force in chloroplasts can depend more on Δ pH than mitochondria can? Why is ( Δ ψ ) less in chloroplasts than in mitochondria?

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