Multiple Choice
In oxidative phosphorylation, what is the primary role of NADH and FADH2?
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Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation
Oxidative Phosphorylation 1
Multiple Choice
In oxidative phosphorylation, how many electrons does NADH donate to Complex I of the electron transport chain?
A
2
B
4
C
1
D
0 (it carries only protons)
Verified step by step guidance1
Recall that NADH is a key electron carrier in cellular respiration, specifically in oxidative phosphorylation.
Understand that NADH donates electrons to Complex I (NADH:ubiquinone oxidoreductase) of the electron transport chain.
Recognize that each NADH molecule carries a pair of high-energy electrons, which it donates to Complex I.
Therefore, the number of electrons donated by NADH to Complex I is 2, since electrons are transferred in pairs.
This electron transfer initiates the process of proton pumping and ultimately contributes to ATP synthesis.
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