light dependent reactions

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5 Terms

1
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where does this occur

thylakoid membranes

2
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light harvesting

  • Photosystems: pigments around a reaction centre.

  • light strikes a accessory pigments, passes energy until reaches reaction centre chlorophyll.

  • chlorophyll loses an electron and sends it to a electro acceptor (ETC)

3
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cyclic photophosphorylation

ELECTRONS RECYCLED.

  • ATP products.

  • no photolysis.

  • uses PSI

4
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non cyclic photophosphorylation

  • forms NADPH + ATP

  • electrons are replaced by photolysis

  • uses PSII and PSI

5
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photolysis of water

  • provides electeons to etc and protons to reduce NADP+

  • replaces electrons lost by chlorophyll