Cu is present in:
Correct answer: A. Plastocyannin
- A. Plastocyannin
- B. Cytochrome b6f
- C. Ferredoxin
- D. Chlorophyll
Explanation
Copper is present in plastocyanin, a protein that transfers electrons from the cytochrome b6f complex to Photosystem I during the light reactions of photosynthesis. Other options like ferredoxin, cytochrome b6f, and chlorophyll do not contain copper; they use iron or magnesium instead and have different roles in photosynthesis.
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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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