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Which one of the following is the first electron accepter from FADH2 during electron transport chain?

Correct answer: A. Coenzyme Q

  • A. Coenzyme Q
  • B. Cytochrome a
  • C. Cytochrome b
  • D. Cytochrome c

Explanation

Coenzyme Q, also known as ubiquinone, is a lipid-soluble molecule in the electron transport chain located in the inner mitochondrial membrane. It transports electrons from Complex I and Complex II to Complex III, acting as a mobile electron carrier. Coenzyme Q also plays a role in maintaining the proton gradient across the membrane, which drives ATP synthesis. Its antioxidant properties further protect cells from oxidative damage.

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About Bioenergetics

Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.

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