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The approximate proton motive force of an actively respiring mitochondrion is ____________ mV.

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The approximate proton motive force of an actively respiring mitochondrion is ____________ mV.

(a) 220

(b) 240

(c) 260

(d) 280

This question was addressed to me during an interview for a job.

I need to ask this question from Aerobic Respiration topic in portion Nucleus & Aerobic Respiration of Cell Biology

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Correct option is (a) 220

To explain: The approximate proton motive force that an actively respiring mitochondrion generates across its inner membrane is 220 mV. In mammalian mitochondria, 80 percent is represented by the voltage component and 20 percent by proton concentration.

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