Chloroplast structure

• Chloroplast envelope =

  Double membrane

  Keeps the reactants for photosynthesis close to their reaction sites.
• Thylakoids =

  Fluid filled sacs

  Large SA

  So absorbs as much light as possible
• Grana = stacked up thylakoids
• Lamellae =

  Thylakoid membranes that link grana
• Thylakoid membrane =

  Where LDR happens

  Has lots of ATP synthase molecules

  To make ATP for LDR
• Photosynthetic pigments (in TM) =

  Coloured substances

  That absorb light energy for photosynthesis

  e.g. chlorophyll a/b, carotene

  Arranged in photosystems
• Stroma =

  Where LIR happens

  Gel-like substance inside inner membrane

  Surrounds thylakoids
• Oil droplets = stores of non-carbohydrate organic material in the stroma
• Starch grain = stores of carbohydrate organic material in the stroma
• Label a chloroplast

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