Question:medium

Which electron transport chain complex does not pump protons across the mitochondrial inner membrane?

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Remember: \[ \boxed{ \begin{aligned} \text{Proton pumps} &: \text{Complex I, III, IV} \text{No proton pumping} &: \text{Complex II} \end{aligned} } \]

Updated On: Jul 14, 2026

Complex I
Complex II
Complex III
Complex IV

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The Correct Option is B

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