Multiple Choice
In mitochondrial oxidative phosphorylation, the final electron acceptor of the electron transport chain (ETC) is which molecule?
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Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation
Oxidative Phosphorylation 2
Multiple Choice
In oxidative phosphorylation, what is the final electron acceptor in the mitochondrial electron transport chain (ETC)?
A
Cytochrome
B
NAD
C
Coenzyme Q (ubiquinone)
D
Molecular oxygen ()
Verified step by step guidance1
Understand the role of the electron transport chain (ETC) in oxidative phosphorylation: it transfers electrons through a series of protein complexes to ultimately produce ATP.
Identify the flow of electrons: electrons are passed from NADH and FADH2 to protein complexes and mobile carriers like Coenzyme Q (ubiquinone) and Cytochrome c.
Recognize that each carrier passes electrons to the next until they reach the final electron acceptor.
Recall that the final electron acceptor in the mitochondrial ETC is molecular oxygen (O\_2), which accepts electrons and combines with protons to form water.
Summarize that without molecular oxygen accepting electrons, the ETC would halt, stopping ATP production.
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