The Z-scheme is
Correct answer: A. Non-cyclic photophosphorylation
- A. Non-cyclic photophosphorylation
- B. Cyclic photophosphorylation
- C. Cyclic oxidation
- D. Oxidative phosphorylation
Explanation
The Z-scheme is a model of the electron transport pathway during non-cyclic photophosphorylation in chloroplasts. It highlights the transfer of electrons from water to NADP+ via photosystem II and photosystem I, resulting in the formation of ATP and NADPH. These products are essential for the Calvin cycle in photosynthesis.Option A is correct, as it accurately describes this process. Option B describes cyclic photophosphorylation, which does not generate NADPH and is not represented by the Z-scheme. Option C refers to a non-existent process in cellular bioenergetics. Option D explains oxidative phosphorylation, a mitochondrial process separate from the activities described by the Z-scheme.
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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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