Question

Fixation of one CO2 molecule through Calvin cycle
requires
(a) 1 ATP and 2NADPH2
(b) 2ATP and 2NADPH2
(c) 3ATP and 2NADPH2
(d) 2ATP and 1NADPH2

Answer 1

Explanation:

option c is the right answer bro

Answer 2

Fixation of CO2:

• Option “C” is correct i.e. 3ATP and 2NADPH2.

• The fixation of one CO2 molecule through the Calvin cycle requires 3 ATP molecules and two NADPH2 molecules.

• At the end of each Calvin cycle, the net increase is 9ATP and 6 NADPH2. In each Calvin cycle, 3 CO2 particles are fixed with RuBP to make 2 molecules of 3PGA in the 1st step. Far ahead two molecules of 3PGA through a series of reactions renew 2RuBP in the third stage. So, for the fixation of one CO2 through the Calvin cycle needs 3ATP and 2NADPH2.

Hope it helped...