Step 1. The light energy excites the electrons in photosystem 2 which causes the water molecule to split which releases an electron into the eletron transport system. A hydrogen ion into the thylakoid space and oxygen as a waste product. Water is essential for photosynthesis to occur.
Step 2/3 Then the excited electron moves from photosystem 2 to an electron-acceptor molecule in the thylakoid membrane. The eletron acceptor molecule transfers the eletron to a series of electron-carriers to photosystem 1
Step 4. In the presence of light the photosystem 1 transfers the eletron to a protein called ferrodoxin. The electrons lost by photosystem 1 are then replaced by photosystem 2.
Step 5. Finally ferrodoxin transfers the electrons to the electron carrier NADP+, forming the energy-storage molecule NADPH.
Step 1. Carbon fixation. 6 carbon dioxide (co2) molecules combine with 6 five carbon compounds that form 12 three carbon molecules called 3-phosphoglycerate.
Step 2. The chemical energy that is stored in ATP and NADPH is transfered to the 3-PGA that then form high energy molecules that are called glyceraldehyde 3-phosphates. ATP supplies the phosphate groups while NADPH supplies hydrogen electrons and ions.
Step 3. 2 three PGA molecules leave the cycle to be used for the making of glucose and other compounds.
Step 4. A enzyme called rubisco combines with the remaining ten G3P molecules into 5-carbon molecules called ribulose 1, 5-bisphosphate. Then they combine with new carbon dioxide molecules to continue the cycle.