Biology: The Light Dependent Reaction

In the Light Dependent phase of photosynthesis, light strikes Photosystem II, causing the electron to become excited. The excited electron bounces up to an electron acceptor, and is then passed down the electron transport chain. As the electron goes down the ETC, the electron loses energy. The energy released is used to produce ATP. At the same time, light is hitting Photosystem I, which makes it's electron's excited. The electrons are passed to another electron …

…photolysis). Oxygen is released to the atmosphere. At the end of the second ETC, the electron is picked up by NADP+. The hydrogen + ions that resulted from photolysis are also picked up by the NADP+, making NADPH. The light dependent reaction takes place in the thylakoid membrane. -Reactants: Light Energy Chlorophyll ADP+P NADP+ Enzymes Water -Products: Oxygen- byproduct or used in cell ATP- goes to light independent reaction NADPH- goes to light independent reaction