BRAINCAKECalvin Cycle
ATP and reduced NADP from the light-dependent reactions are used in the Calvin cycle which is a light-independent process. The three main stages are carbon dioxide fixation - the combination of carbon dioxide with 5carbon ribulose bisphosphate (RuBP) to form a 6C compound, the splitting into two 3carbon molecules and the reduction of the glycerate phosphate subsequently formed to form triose phosphate and the regeneration of RuBP so that the cycle can continue. Rubisco, the enzyme that catalyses CO2 fixation, is the rate-limiting enzyme in photosynthesis.
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Key terms in this lesson
- ATP
- Adenosine triphosphate, the universal energy currency of cells, which releases energy for cellular reactions when hydrolysed to ADP and inorganic phosphate.
More in Energy for Biological Processes
- ATP
- Chloroplasts
- Photosynthetic pigments
- Photosystems
- Cyclic Photophosphorylation
- Non-cyclic Photophosphorylation
- Chemiosmosis
All 8 lessons in Energy for Biological Processes · All OCR A-level Biology topics