CELL RESPIRATION
THE KREBS CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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NADH
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FADH2
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ATP
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Oxygen
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NADH and FADH2
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Detailed explanation-1: -NADH and FADH2 carry high-energy electrons to the electron transport chain in cellular respiration. NADPH carries high-energy electrons to the electron transport chain in photosynthesis.
Detailed explanation-2: -Explanation: Both NADH and FADH2 donate two electrons to the electron transport chain, so theoretically they should make the same amount of ATP. However, NADH donates its electrons to complex I while FADH2 donates its electrons further “downstream” at complex II.
Detailed explanation-3: -The electrons originally come from glucose. NADH and FADH2 carry electrons to the electron transport chain in cellular respiration. After electron transport in cellular respiration, the electrons are attracted to oxygen molecules (O2) which combine with protons (H+) to make water (H2O) molecules.