The Light-dependent Stage:

LIGHT DEPENDENT STAGE = OCCURS IN GRANA

It involved the direct use of light energy. This stage consists of...

  • light harvesting at the photosystems
  • photolysis of water
  • photophosphorylation - the production of ATP in the prescence of light
  • the formation of reduced NADP
  • oxygen is produced

Two Types of Photosystem: 

  • In photosystem I, the pigment at the primary reaction centre is a type of chlorophyll a, which has a peak absorption of red light of wavelength 700nm.
  • In photosystem II, the pigment at the primary reaction centre is also a type of chlorophyll a, but this has a peak absorption of red light of wavelength 680nm. 

The Role of Water:

In…

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