AP Biologyeasymcq1 pt
What is the role of oxygen in cellular respiration?
A.Final electron acceptor, forming water
B.It phosphorylates ADP directly
C.It splits glucose
D.It carries electrons between complexes
Explanation
Core Concept
Oxygen accepts the spent electrons at the chain's end, combining with H⁺ to make water. Without it, the chain backs up and NADH cannot be reoxidized.
Correct Answer
AFinal electron acceptor, forming water
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