What happens in the light independent reactions of photosynthesis?

The light-dependent reactions (LDR) take place in the stroma. It is also referred to as the Calvin Cycle.

CO2 and RUBP combine, using the enzyme RUBISCO. This forms an unstable 6C carbon- which immediately breaks down into two 3C carbons (GP)

GP is then reduced (hydrogen ion added) to GALP. The H+ is donated from NADPH to allow this to happen. And ATP (from the light dependent reactions) is also used to help the reaction. 12 GALP molecules are produced.

2 of the 12 GALP, are used towards the production of glucose- which is used for respiration and structure formation.

The other 10 of the GALP are rearranged and phosphorylated using ATP. This forms RUBP, allowing the cycle to repeat.