Carbohydrates

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  • Carbohydrates
    • Amylose
      • structure
      • function
        • insoluble. dont affect water potential
        • large molecule, cant leave cell
    • Cellulose
      • function
        • long and straight chains. linked together by many H bonds to form fibrils. provide strength to cell wall
          • can resist osmotic pressure. bond difficult to break
            • microfibril-> fibril
              • OH group point outwards
          • H bonds collectively strong
      • structure
        • B glucose
          • beta 1-4 linkages
        • inverted alternate molecules
          • straight unbranched chains
        • condensation bonds
    • Amylopectin
      • structure
        • repeating units of alpha 1-4 glycosidic bonds
        • 1- 6 linkage every 30 monomers
      • function
        • branched- broken down to release energy for glucose
    • Glycogen
      • structure to function
        • highly branched. glucose broken down through resp at faster rate
          • 1-6 linkage come off main chain every 4 glucose mols
          • repeating units of 1-4 alpha glycosidic bond
        • compact- alpha glucose. lots stored in small space
        • insoluble- not affect water potential or leave cells
    • starch- made up of alpha glucose
    • difference between starch and cellulose
      • position of hydrogen and hydroxyl groups on carbon atom 1 inverted
      • starch contains alpha glucose. helical
      • no fibrils/ H bonds between molecules
    • starch similar to cellulsoe
      • polysaccharides
      • contain CHO
      • glycosidic bonds. 1- 4 linls
      • Untitled
  • long and straight chains. linked together by many H bonds to form fibrils. provide strength to cell wall
    • can resist osmotic pressure. bond difficult to break
      • microfibril-> fibril
        • OH group point outwards
    • H bonds collectively strong
  • repeating units of alpha glucose. straight unbranched chains

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