#monosaccharide__monosaccharose__simple_sugar  a sugar (like sucrose or fructose) that does not hydrolyse to give other sugars; the simplest group of carbohydrates
  supertype:  carbohydrate__saccharide__sugar  an essential structural component of living cells and source of energy for animals; includes simple sugars with small molecules as well as macromolecular substances; are classified according to the number of monosaccharide groups they contain
  subtype:  triose  any monosaccharide sugar containing three atoms of carbon per molecule
  subtype:  tetrose  any monosaccharide sugar containing four atoms of carbon per molecule
  subtype:  pentose  any monosaccharide sugar containing five atoms of carbon per molecule
  subtype:  hexose  a monosaccharide that contains six carbon atoms per molecule
     subtype:  aldohexose  a monosaccharide sugar having six carbon atoms and an aldehyde group
        subtype:  glucose  a monosaccharide sugar that has several forms; an important source of physiological energy
           subtype:  corn_sugar.glucose__cornsugar  dextrose made by hydrolysis of cornstarch
           subtype:  dextrose__dextroglucose__grapesugar  an isomer of glucose that is found in honey and sweet fruits
           subtype:  blood_sugar__blood_glucose__bloodglucose  glucose in the bloodstream
     subtype:  ketohexose  a monosaccharide having six carbon atoms and a ketone group
        subtype:  fructose__fruit_sugar__fruitsugar__levulose__laevulose  a simple sugar found in honey and in many ripe fruits
  subtype:  aldose  a monosaccharide sugar that contains the aldehyde group or is hemiacetal
     subtype:  aldohexose  a monosaccharide sugar having six carbon atoms and an aldehyde group
  subtype:  ketose  any monosaccharide sugar that contains a ketone group or its hemiacetal
     subtype:  ketohexose  a monosaccharide having six carbon atoms and a ketone group

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