Q. The conversion of phosphoglyceric acid to phosphoglyceraldehyde during photosynthesis can be described :
(a) Oxidation
(b) Hydrolysis
(c) Electrolysis
(d) Reduction
Solution :
Correct option : D 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.