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

Answer: (b)

The Calvin cycle is also known as C₃cycle because CO₂ reduction is cyclic process and first stable product in this cycle is a 3-C compound (i.e., 3-phosphoglyceric acid or 3-PGA). In this cycle, CO₂ acceptor molecule is RuBP or RuDP (i.e., Ribulose 1, 5-biphosphate or Ribulose 1, 5-diphosphate). There occurs covalent bonding of CO₂ to RuBP and the enzyme catalyzing this reaction is RuBP-carboxylase/oxygenase (RuBisCO).