The photoionisation of energy also results in a release of energy.
This energy is used in photosynthesis to drive three reactions.
- Photophosphorylation - production of ATP from ADP and inorganic phosphate.
- Reduction - production of reduced NADP from NADP.
- Photolysis - splitting of water into protons, electrons and oxygen.
There are all necessary for photosynthesis to take place.