Photosystems are located in the _.
Correct answer: C. Thylakoid membranes
- A. Stroma
- B. Chloroplast envelope
- C. Thylakoid membranes
- D. Intergrana
Explanation
Photosystems I and II are integral parts of the thylakoid membranes within chloroplasts, where they play a critical role in the light-dependent reactions of photosynthesis by capturing light energy and converting it into chemical energy. The stroma, chloroplast envelope, and intergrana do not house photosystems; the stroma is involved in the Calvin cycle, the envelope regulates transport, and the intergrana are spaces between granal stacks.
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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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