Question

Question 1 (1 point) Saved How many molecules of FADH2 must be oxidized to produce a proton motive force large enough to form 15 molecules of ATP in the cytosol by oxidative phosphorylation? Your Answer: 10 Answer Question 2 (1 point) Saved For each molecule of ATP synthesized by oxidative phosphorylation for the cytosol, protons of the proton motive force are 1) 3...dissipated 2) 4... .produced 3) 4...dissipated 4) 3...produced

Answer 1

1.

FADH2 pump 6 H⁺ to the intermembrane space

4 H⁺ are required by ATP synthase to form 1 ATP

So, for 15 ATP molecules 60 H⁺ to be transmitted to the intermembrane space

So 10 FADH2 must be oxidised to produce a motive force large enough to form 15 molecules of ATP.

2 . 3) 4.... Dissipated

Because ATP synthase required 4 protons from the proton motive force generated by NADH and FADH2 for the synthesis of 1 molecule of ATP.

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