Light reactions: electron flow in photosystems.
energy from a photon
is passed among chlorophyll
- The energy is eventually captured in an electron
in Photosystem II.
- The splitting of the electron donor, water,
- The electron
passes through an electron transport chain (ETC).
- The energy from the electron
is used to generate ATP.
- Another photon
molecules of Photosystem I.
- Energy is passed among electrons
to a 2nd ETC.
- Energy from this 2nd ETC
is stored in the electron acceptor NADPH.