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.
TG
Related Biology A Level answers
All answers ▸Type 1 Diabetes is an autoimmune disease affecting the bodies ability to produce insulin. Describe how blood glucose is controlled in the body to a stable level, and how this would be affected in someone with type 1 diabetes.
Q: Describe the structure of an amino acid and the formation of a peptide bond.
Describe the cardiac cycle (7 marks)
What are enzymes and how do they work?