For one electron entering the electron transport chain at complex I,how many times is it handed off between redox active cofactors on its way through the enzyme complexes to end up on O₂? A) ~2000 B) ~200 C) ~20 D) ~2

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Quizplus · Accepted Answer

One electron handed off from complex I to complex III, and then it is handed off from complex III to complex IV where it ends up at O₂. Therefore, the electron is handed off approximately 20 times.

For One Electron Entering the Electron Transport Chain at Complex