Photosystem I and photosystem II are found in:
Correct answer: B. Grana of chloroplast
- A. Stroma of chloroplast
- B. Grana of chloroplast
- C. Matrix of mitochondria
- D. Inner membrane of mitochondria
Explanation
Photosystem I and photosystem II are integral components of the light-dependent reactions in photosynthesis. They are located in the thylakoid membranes of the grana within chloroplasts. These photosystems capture light energy and facilitate the transfer of electrons, essential for the synthesis of ATP and NADPH. The stroma, on the other hand, is where the Calvin cycle (light-independent reactions) occurs, while the mitochondria are involved in cellular respiration, not photosynthesis.
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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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