Question

In electron transport, the three protein complexes (I, III, and IV)
A) act as proton pumps, which generate a proton gradient.
B) transfer electrons from NAD+ to O2.
C) transfer electrons from FAD to O2.
D) act as electron pumps, which generate an electron gradient.
E) act as Ca2+ pumps, which generate a Ca2+ gradient.

Answer

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