There are two steps to photosynthesis. step one is the electron transport chain which takes place in the chloroplast.
the green circles are the chloroplasts in the cell
in step one plants capture the energy from the sun and turn it into food for the plant. this process is light dependent. Light from the sun hits photosystem II. the photo systems contain pigments like chlorophyll that trap the light. when this happens a water molecule is split and an electron is released into the chain. Oxygen is given off