Chloroplasts

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  • Chlorplasts
    • Double membrane: chloroplast envelope
      • In inner membrane & surrounding thylakoids is a gel like substance
        • Stroma
          • Enzymes, sugars, organic acids
          • Carbohydrate from photosynthesis
            • Stored as Starch grains
    • Grana/Granum
      • Stacks of thylakoids
        • Fluid filled sacs
      • Join together by lamelle
    • Photosynthetic pigments
      • Chlorophyll a
      • Chlorophyll b
      • Carotene
      • Coloured substances that absorb light energy
      • Attached to proteins
        • Found in:
          • Stacks of thylakoids
            • Fluid filled sacs
      • Photosystem
        • Attached to proteins
          • Found in:
          • Pigments
            • Accessory pigments
              • Surround primary pigments & transfer light energy to them
            • Primary pigments
              • Reaction centres, electrons excited during LD reaction
          • PS1: absorbs light at 700nm
          • PS11: 680nm

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