Statement A : Sugar is synthesised in reduction phase of C₃ cycle.
Statement B : Biosynthetic phase is dependent on products of light reaction.

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Both statements are incorrect

Both statements are correct

Only A is correct

Only B is correct

answer is A.

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Detailed Solution

Statement A is correct. In the C₃ cycle, which is another name for the Calvin cycle or the light-independent reactions of photosynthesis, sugar (specifically, glyceraldehyde-3-phosphate, G3P) is synthesized during the reduction phase. During this phase, ATP and NADPH, produced by the light-dependent reactions in the thylakoid membrane during the light reaction, are utilized to convert 3-phosphoglycerate (3-PGA) molecules into G3P. G3P is a 3-carbon compound that can be used to synthesize glucose and other sugars.

Statement B is correct. The biosynthetic phase, which refers to the light-independent reactions or the Calvin cycle, is indeed dependent on the products of the light reaction (light-dependent reactions) that occur in the thylakoid membrane of the chloroplasts. These products are ATP and NADPH.

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