Inside an active mitochondrion, most electrons follow which pathway?
A) glycolysis ? NADH ? oxidative phosphorylation ? ATP ? oxygen
B) citric acid cycle ? FADH2 ? electron transport chain ? ATP
C) electron transport chain ? citric acid cycle ? ATP ? oxygen
D) pyruvate ? citric acid cycle ? ATP ? NADH ? oxygen
E) citric acid cycle ? NADH ? electron transport chain ? oxygen
Answer: E
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