Physical properties of carbohydrates, Biology

PHYSICAL PROPERTIES

  • All monosaccharides which have an asymmetric carbon are able to rotate polarized light either to left side (laevorotatory) or right side (dextrorotatory).
  • Dextrorotatory sugars are more common as compared to laevorotatory ones.
  • Laevorotatory fructose (L-fructose) is present in honey and is called laevulose.
  • Pentoses, hexoses and heptoses exist in two forms, Open chain and Ring form.
  • Ring form is again of two types :

(a) Pyranose. Hexagon with 5 carbons and one oxygen.

(b) Furanose. Pentagon with 4 carbons and one oxygen.

  • Both words are given by Howarth.
Posted Date: 10/9/2012 3:30:59 AM | Location : United States







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