Question

The assimilatory power required in reduction phase of calvin cycle per one $C{O}_2$ molecule is ________.

• A. 2 ATP and 2 NADPH
• B. 2 ATP and 3 NADPH
• C. 1 ATP and 2 NADPH
• D. 3 ATP and 2 NADPH

Answer 1

The correct option is A 2 ATP and 2 NADPH

If one $C{O}_2$ is carboxylated two molecules of 3-PGA are produced. To reduce 2 molecules of 3-PGA we require 2 molecules of ATP and two molecules of NADPH.