Light Dependent Reaction

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Created by
Anita M.

Cards (23)

  • Inputs: H2O and Light
  • Output: O2
  • Occurs in the thylakoid membrane.
  • Light Dependent Reaction is the energy building reaction.
  • Light Dependent Reactions collects sun energy.
  • Light Dependent Reactions makes ATP and NADPH.
  • Light Dependent Reactions requires light.
  • Light Dependent Reactions uses light directly.
  • Sunlight is used to make ATP and NADH.
  • Water is needed for electrons and hydrogen ions.
  • Oxygen is a byproduct.
  • Photosystem II is used 1st,
  • Photosystem I is used 2nd.
  • Photosystem I does not deal with ATP.
  • Thylakoid space: high H+
  • Stroma: low H+
  • H2O splits into 1/2 O2, 2 H+, 2 electrons.
  • Photosystem II absorbs light energy and moves high energy electrons to electron carriers.
  • Lost electrons replaced via photolysis, where water is split, creating O2.
  • Electrons go through electron carriers, pumping in proteins up the concentration gradient.
  • H+ ions go down the concentration gradient through ATP Synthase to change ADP to ATP.
  • Photosystem I reenergizes electrons.
  • The second electron carriers transfer electrons and reduces NADP+ to NADPH.