Question

While conversion of phosphoglyceric acid into phosphoglyceraldehyde during photosynthesis one of the following reactions occur

• A. Oxidation
• B. Reduction
• C. Electrolysis
• D. Hydrolosis

Answer 1

Answer: (B)

Reduction

In Calvin cycle, carbon dioxide along with water gets converts into phosphoglyceric acid. Then this phosphoglyceric acid converts into phosphoglyceraldehyde or glyceraldehyde 3 phosphate (G3P) with the use of ATP and NADPH. In this reaction NADPH gets oxidised to NADP+. Thus, this reaction is called as reduction reaction. Thus option B is correct. The other options are incorrect.