What molecule is released from stage one of photosynthesis, but does not move to stage two?
In the light reaction, the splitting of water occurs due to the oxidised Photosystem II. Whereas, the oxidised Photosystem I gets the electron from Photosystem II.
Water splits as following:
ATP produced from chemiosmotic hypothesis as well as NADPH2 produced in the light reaction go into the second stage i.e the Calvin cycle but not the oxygen molecule.