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MCQ Detail

MCQ Detail

Which component of the electron transport chain in mitochondria acts as a proton pump?

A

B

C

D

Answer: NADH dehydrogenase (Complex I)

Explanation:

NADH dehydrogenase (Complex I) is one of the complexes in the electron transport chain that pumps protons from the mitochondrial matrix to the intermembrane space, contributing to the proton gradient.

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