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Multiple Choice
In oxidative phosphorylation, what is FADH2?
A
A reduced electron carrier formed when FAD accepts two electrons and two protons, donating electrons to the electron transport chain at Complex II (succinate dehydrogenase)
B
A high-energy phosphate compound that directly phosphorylates ADP to form ATP in the citric acid cycle
C
The oxidized form of flavin adenine dinucleotide that directly donates electrons to Complex I
D
A mitochondrial membrane protein that functions as the primary proton pump of the electron transport chain