Cytochrome c reduces which coenzyme in the ETC?
Correct answer: A. Cytochrome a
- A. Cytochrome a
- B. Coenzyme Q
- C. Coenzyme b
- D. Coenzyme a3
Explanation
In the ETC, electrons are passed down a chain of carriers from higher to lower energy states. Cytochrome c is a mobile electron carrier that shuttles electrons from Complex III to Complex IV. Within Complex IV, cytochrome a is the first molecule that accepts electrons from cytochrome c. Therefore, cytochrome a is the correct answer, while the other options are either upstream components, not directly involved, or do not exist in this context.
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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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