The photosynthetic electron transport that involves only photosystem I is called
Correct answer: C. Cyclic electron flow
- A. Non-cyclic electron flow
- B. Z-scheme
- C. Cyclic electron flow
- D. Non-cyclic electron flow or Z-scheme
Explanation
The correct answer is 'cyclic electron flow' because it involves only photosystem I and results exclusively in the production of ATP without generating NADPH. This process is crucial for adjusting the ATP/NADPH ratio to meet the demands of the Calvin cycle. In contrast, 'non-cyclic electron flow' and 'Z-scheme' involve both photosystems I and II, producing both ATP and NADPH. The option 'Non-cyclic electron flow or Z-scheme' is incorrect, as it describes pathways involving both photosystems, which does not align with the conditions stated in the question.
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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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