The oxygen consumed during cellular respiration is involved directly in which process or event?
A. accepting electrons at the end of the electron transport chain
B. citric acid cycle
C. glycolysis
D. oxidation of pyruvate to acetyl CoA
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When hydrogen ions are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is the
A. formation of ATP.
B. restoration of the Na+/K+ balance across the membrane.
C. reduction of NAD+.
D. creation of a proton gradient.
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