NEET Biology Photosynthesis In Higher Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Photosynthesis In Higher Plants Topic Based

Question & Answer Discuss:

The carbon dioxide acceptor in Calvin cycle/ C3 -plants is

(a) phosphoenol pyruvate (PEP)

(b) phosphoglyceric acid (PGA)

(c) ribulose 1, 5-diphosphate (RuDP)

(d) ribulose monophosphate (RMP).

Answer: (c)

In Calvin cycle, $CO_2$ is accepted by Ribulose - 1, 5 - diphosphate (RuDP) already present in the cells and a 6-carbon addition compound is formed which is unstable. It soon gets converted into 2 molecules of 3-phosphoglyceric acid due to hydrolysis and dismutation. Phosphoenol pyruvate (PEP) and Phosphoglyceric acid (PGA) are formed in glycolysis.

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