Carbs

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  • Created by: Leenaa
  • Created on: 28-05-15 20:29
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  • Carbs
    • Alpha glucose has 'H' on the top - IT IS A MONOSACC
    • Formation and breakage of a disaccharide and a polysacchride
      • Maltose - disaccharide
        • FORMATION
          • Undergoes condensation - H2O leaves (OH from one glucose and H from the other) - forms C-O bond
        • BREAKAGE
          • Undergoes hydrolysis reaction - water breaks the glycosidic bond
      • Polysacc. - Amylose
        • More than two monosacc's join - many glycosidic bonds
    • Starch (main energy storage material in plants) - ALPHA GLUCOSE
      • Plants get energy from glucose - store excess glucose as starch
        • Plants break down starch to get the glucose
          • STARCH IS A MIXTURE OF TWO POLYSACC. AMYLOSE AND AMYLOPECT
            • Amylopectin
              • Long, branched, branches for enzymes to break down molecule - quick release of glucose
            • Amylose
              • Long, unbranched chain of a.g, coiled structure, compact, storage, fit in small space
      • Insoluble in water - doesn't affect water potential - GOOD FOR STORAGE
    • Glycogen (main energy storage in animals) ALPHA GLUCOSE
      • Excess glucose stored as glycogen
      • Lots of side branches for rapid release of glucose (animals need for activity)
      • Compact, good for storage
    • Cellulose (major component of cell walls in plants) BETA GLUCOSE
      • Long unbranched beta glucose
      • Hydrogen bonded cross links to give strength
        • Forms microfibrils
          • Structural support in plant cell walls

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