PII absorbs photons of light energy which is ultimately passed to chlorophyll P 680 . Chlorophyll P 680 is now ionized. Chlorophyll P 680 is not stable and wants electrons replaced that were given up. Electrons are returned to chlorophyll from the splitting of water - called photolysis . Electrons passed to the electron acceptor move down an electron transport system.
Energy is released and used to pump protons from stroma to thylakoid space.
Name the components of the electron transport system. Which one functions as a proton pump. Called chemiosmotic phosphorylation . This process is also called photophosphorylation . PI absorbs light.