Multiple Choice
In aerobic cellular respiration, which process yields the greatest amount of ATP per glucose molecule?
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Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation
Oxidative Phosphorylation 1
Multiple Choice
In oxidative phosphorylation, how many electrons are donated by one molecule of FADH2 to the electron transport chain?
A
2 electrons
B
4 electrons
C
6 electrons
D
1 electron
Verified step by step guidance1
Recall that FADH2 is a reduced coenzyme that donates electrons to the electron transport chain during oxidative phosphorylation.
Understand that each molecule of FADH2 carries electrons in pairs because electrons are transferred in pairs in biological redox reactions.
Recognize that FADH2 donates its electrons specifically to Complex II (succinate dehydrogenase) in the electron transport chain.
Since each FADH2 molecule carries two electrons, it donates exactly two electrons to the electron transport chain.
Therefore, the number of electrons donated by one molecule of FADH2 to the electron transport chain is 2 electrons.
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