What happens in plant cells during photosynthesis?

Answer 1

In the thylakoid of the chloroplast inside a plant, the organelle called Photosystem II is excited by light through the leaves of the plant. When this happens it breaks up H20, (water from the roots), into H2 and 02. (Oxygen cannot exist as one single molecule stably, therefore it bonds with other oxygen molecules forming 02 rather than the one oxygen molecule bonded with the two hydrogen in H20.) The oxygen goes through the stroma of the leaves, this is called transpiration. The hydrogen goes down through another organelle called ATP synthase where it is transformed into ADP and then combined with another phosphate group to become ATP. During the time that Photosystem II breaks up H20, it also sends electrons down the electron chain to Photosystem I where the electrons then convert NaDP+ into NaDPH. These two products are then sent to the Calvin Cycle. In the Calvin Cycle, ATP and NaDPH are turned into glucose by two turns of the cycle.