NADPH₂ is produced in photosynthesis during:
Correct answer: C. Non-cyclic photophosphorylation
- A. Dark reaction
- B. Pseudo-cyclic photophosphorylation
- C. Non-cyclic photophosphorylation
- D. Cyclic photophosphorylation
Explanation
The correct answer is noncyclic photophosphorylation. This process occurs in the light-dependent reactions of photosynthesis, wherein electrons are transported from Photosystem II to Photosystem I, ultimately leading to the production of both ATP and NADPH. NADPH is specifically generated through the reduction of NADP+ at the end of this electron transport chain. The other options, such as cyclic and pseudo-cyclic photophosphorylation, primarily focus on ATP production and do not produce NADPH. The 'dark reaction' (Calvin cycle) uses NADPH to fix carbon but does not produce it.
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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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