The Calvin Benson Cycle
                             "dark reactions"

These reactions do not depend directly upon the presence of light.

This cycle occurs in the stroma and requires 18 ATP's, 12 NADPH's, and CO₂.

The Calvin Benson cycle is the opposite of the citric acid cycle in that
the citric acid cycle produces ATP and NADP
and glucose is broken down to make CO₂. 
The Calvin Benson cycle uses ATP, NADPH,  and CO₂ is used to make glucose.

                                                                               BACK to main

        to C4 plants web page

          to photosystems 2 and 1 page