During photosynthesis, when PGA is changed into phosphoglyceraldehyde, which of the following reaction can occur?

Oxidation

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Reduction

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Electrolysis

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Hydrolysis

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Solution

The correct option is B Reduction
Reduction is the second process in dark reaction, where 3- PGA is first phosphorylated to 1, 3-biphosphoglycerate in the presence of an enzyme phosphoglycerokinase. Then 1, 3-biphosphoglycerate is reduced to glyceraldehyde 3- phosphate in the presence of NADPH.

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