When one CO₂ molecule is fixed as one molecule of triose phosphate, which of the following photochemically made, high-energy chemical intermediates are used in the reduction phase? (NEET 2022-R)

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2 ATP + 2 NADPH

2 ATP + 1 NADPH

1 ATP + 1 NADPH

1 ATP + 2 NADPH

answer is A.

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Detailed Solution

One molecule of CO₂, produces 2 triose phosphate molecules and needs 2 ATP and 2 NADPH + H⁺ during the reduction phase.Practically production of 1 triose phosphate from 1 CO₂ is not possible but as per the given question if from 1 CO² we need to produce 1 triose phosphate, then 1 ATP and 1 NADPH + H⁺ would be required.

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