{ BIO } OCR F212 2.1.1 Sugar

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  • Created by: kaen
  • Created on: 26-05-15 13:50
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  • SUGAR
    • GLUCOSE
      • ALPHA
        • -OH below plane of ring
      • mono saccharide
      • hexose
      • BETA
        • -OH above plane of ring
      • used in respiration
    • GLYCOSIDIC BOND
      • CONDENSATION
        • -H and -OH    lost         =        water
          • O binds to C
            • glycosidic bond formed
      • HYDROLYSIS
        • water added
          • H- binds to O
          • -OH binds to C4
          • glycosidic bond broken
      • poly saccharide
        • multiple 1,4-glycosidic bonds
    • POLY SACCHARIDE
      • AMYLOSE (starch)
        • alpha-glucose
        • straight chain
        • forms helix
          • compact
            • use as storage
        • insoluable
          • doesn't effect  water potential
            • use as storage
      • CELLULOSE
        • beta-glucose
          • alternate sub-units inverted
        • straight chain
          • lie side by side
            • hydrogen bonds
              • strong
        • plant cell walls
      • GLYCOGEN
        • lots of branches
          • broken down quickly

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