Hi I just wanted to explain what happens in the light dependent aof photosynthesis, so that someone could correct me if I'm wrong and tell me if my explanation needs to be changed
Light dependent reactions:Photons from the sun are absorbed by chlorophyll molecules in Photosystem 2 and this excites the electrons of the chlorophyll molecules, thus they move to excited states. These electrons then travel through the electron transport chain, releasing their energy in a series of stops, through a range of molecules. The chlorophyll molecules of photosystem 2 however, now have a lack of electrons and so they split water into oxygen, electrons and protons (H+). This oxygen gas is released as a by product and Photosystem 2 takes these electrons, so that it has electrons once again. The energy released by the electrons travelling in the electron transport chain is then used to pump the protons (H+) produced through the photolysis of water, into the thylakoid lumen. This creates a concentration gradient of charge, and the positive charge is greater in the interior of the thylakoid lumen. Therefore the hydrogen ions move through ATP synthase in order to return to regions of low concentration, and the movement of the hydrogen ions through ATP synthase, provides energy for the phosphorylation of ADP to form ATP.
The spent electrons at the end of the electron transport chain get accepted by the carrier molecule NADP+ and so do the hydrogen ions that moved through ATP synthase. Thus NADP+ forms into NADPH.
The energy contained within the NADPH and ATP molecules produced in the light dependent reactions are then used in the Calvin cycle.
Is this correct? Thanks