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Question

Name the terminal acceptor of electrons in the mitochondrial electron transport chain.

A
Nitrate
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B
Fumerate
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C
Succinate
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D
Oxygen
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Solution

The correct option is D Oxygen
ATP is produced during the process of oxidative phosphorylation in the mitochondria. The electron transport chain plays an important role in this process. The electrons move through a series of electron donors and carriers that lead to the formation of a potential gradient. This gradient helps in ATP synthesis. During this process, oxygen is reduced by the hydrogen from NADH and it finally accepts the electron in the chain. Thus, it is the terminal electron acceptor that results in the formation of water molecules. Thus, the correct answer is option D.
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