1. Light-Dependent Reaction

• What does this reaction need?

  light energy
• where does the light-dependent reaction occur?

  in the thylakoid membranes of the chloroplasts
• What happens in the light-dependent reaction?

  Light energy is absorbed by chlorophyll (and other photosynthetic pigments) in the photosystems.

  The light energy EXCITES the electrons in the chlorophyll, leading to their eventual release from the molecule

  The CHLOROPHYLL HAS BEEN PHOTOIONISED
• What is some lf
• What is some of the energy from the released electrons used to do?

  Used to add a phosphate group to ADP to form ATP,

  some is used to reduce NADP to form REDUCED NADP
• What does ATP do ?

  transfers energy to the light-dependent reaction ?
• What does REDUCED NADP do ?

  REDUCED NADP transfers hydrogen to the light-dependent reaction?
• What happens to H2O during the process?

  H2O is oxidised to O2