Question

Identify the incorrect statement about Calvin cycle.

• A. NADPH + H${}^{+}$ produced in light reaction is used to reduce diphosphoglycerate.
• B. First stable intermediate compound is phosphoglycerate.
• C. Carboxylation of RuBP is catalysed by RuBisCO.
• D. 18 molecules of ATP are synthesised during carbon fixation.

Answer 1

Answer: (D)

18 molecules of ATP are synthesised during carbon fixation.

A) The NAPDH + $H^{+}$ that is produced during non cyclic phosphorylation is used to reduce diphosphoglycerate.
B) The first stable intermediate formed is PGA (phosphoglycerate).

C) RuBisCO catalyses the carboxylation of RuBP.
D) ATP is consumed, not produced in Calvin's cycle.
So the correct option is '18 molecules of ATP are synthesised during carbon fixation.'