Monosaccharides

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  • Created by: Jessica
  • Created on: 13-12-12 23:51
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  • Monosaccharides
    • Monomer
      • Each individual molecule that make up a monosaccharide chain is a monomer
      • In carbohydrates the basic monomer unit is sugar (saccharide)
      • A single monomer is therefore a monosaccharide
    • Polymer
      • Long chains of monomers
    • sweet tasting, soluble substances
    • General formula = (CH2O)n
      • n can be any number from 3 to 7
    • Tests (2 tests for monosaccharides)
      • Reducing sugars
        • 1)  Add food sample in a liquid form
          • 2) Add benedicts reagent
            • 3)Heat in a water bath for 5 minutes
              • Results in a colour change
                • Medium
        • Benedicts test
      • Non-reducing sugars
        • first you have to break a disaccharide down to a monosaccharide
        • 1) Add food sample (In liquid form)
          • 2) add acid (hydrochloric acid)
            • 3) heat for 5 minutes
              • 4) Add an alkaline to neutralise
                • 5) retest with benedicts test
  • Medium

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