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Light Dependent Reaction

1) Light hits Photosystem II. The light energy excites the electron in the chlorophyll. The electrons therefore gain energy and begin to move along the electron transport chain to Photosystem I.

2) As the excited electrons from chlorophyll leave Photosystem II, making it positively charged. To make it neutral, photolysis happens. An electron leaves the water molecule, splitting the molecule. Oxygen bubbles off and the hydrogen is used later in forming reduced NADP.

3) The excited electrons lose energy as they move along the electron transport chain. This energy is used to transport protons into the intermembrane…


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