Also known as the Calvin Cycle

All reactions of photosynthesis not directly dependent upon light are known as the dark reactions. They occur whether there is light present or not.

The dark reactions occur in the part of the chloroplast known as the stroma.

The purpose of the dark reactions is to take the energy from ATP and energized electrons and hydrogen ions from NADPH and add them to CO2 to make glucose or sugar.

In 1 turn of the Calvin Cycle, 1 CO2 is changed to 1 CH2O.

6 turns of this cycle are needed to make 1 sugar molecule (glucose)