How many protons are accumulated in intermembrane space of mitochondria from one molecule of $N A D H$ during $E T S$ ?

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Solution

Electrons accumulated in the intermembrane space

In complex I, the oxidation of $N A D H$ releases electrons which is transported to ubiquinone which is present in the inner membrane.

During this process, for each pair of electron being transported to ubiquinone from $N A D H$ through $F M N$ and $F e - S$ center, complex I pumps four protons into the inner membrane space.

Final answer:

(C) Four

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Complex II

Standard XII Biology

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How many protons are accumulated in intermembrane space of mitochondria from one molecule of NADH during ETS?

How many protons are accumulated in intermembrane space of mitochondria from one molecule of $N A D H$ during $E T S$ ?