Question

How many molecules of ATP and NADPH are required for every molecule of CO2 fixed in the Calvin cycle? 

(1) 2 molecules of ATP and 3 molecules of NADPH 

(2) 2 molecules of ATP and 2 molecules of NADPH 

(3) 3 molecules of ATP and 3 molecules of NADPH 

(4) 3 molecules of ATP and 2 molecules of NADPH

Answer 1

Correct option is (4) 3 molecules of ATP and 2 molecules of NADPH  

For fixation of 1 molecule of CO₂ in Calvin cycle 3 ATP molecules and 2 NADPH molecules are required