text: psii absorbs light energy and raises an electron to a higher energy level. this energy is used to do what?   "energetic electrons (from:refernce listed below)   photosystem ii is the first link in the chain of photosynthesis. it captures photons and uses the energy to extract electrons from water molecules. these electrons are used in several ways. first, when the electrons are removed, the water molecule is broken into oxygen gas, which bubbles away, and hydrogen ions, which are used to power atp synthesis. this is the source of all of the oxygen that we breathe. second, the electrons are passed down a chain of electron-carrying proteins, getting an additional boost along the way from photosystem i. as these electrons flow down the chain, they are used to pump hydrogen ions across the membrane, providing even more power for atp synthesis. finally, the electrons are placed on a carrier molecule, nadph, which delivers them to enzymes that build sugar from water and carbon dioxide."   in a nutshell, these energized electrons provide the energy for anything in the cell that needs energy.