Which of the following molecules is an end product of the electron transport

chain and oxidative phosphorylation?

A) NADH

B) FADH2

C) ATP

D) Pyruvate

Click to reveal answer

Answer: C. ATP

Explanation: The electron transport chain and oxidative phosphorylation produce

ATP as the end product. NADH and FADH2 donate electrons to the chain, leading to

the production of a proton gradient that drives ATP synthesis.

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Day 115 MCAT Practice Question