PHYSIOLOGY
MUSCLE ENERGETICS GLYCOLYSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When put in the electron transport chain, NADH and FADH2 can produce ____ ATP respectively.
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1 & 2
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2 & 4
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3 & 2
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2 & 3
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Explanation:
Detailed explanation-1: -The oxidation of one molecule of NADH thus leads to the synthesis of three molecules of ATP, whereas the oxidation of FADH2, which enters the electron transport chain at complex II, yields only two ATP molecules.
Detailed explanation-2: -Oxidation of one molecule of NADH gives rise to 3 molecules of ATP while that of one molecule of FADH2 produces 2 molecules of ATP.
Detailed explanation-3: -NADH enters the ETC at complex I and produces a total of 10 H+ ions through the ETC (4 from complex I, 4 from complex III, and 2 from complex IV). ATP-synthase synthesizes 1 ATP for 4 H+ ions. Therefore, 1 NADH = 10 H+, and 10/4 H+ per ATP = 2.5 ATP per NADH (**some sources round up**).
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