1)Fuel-oxidised to release energy during respiration, which makes ATP 2)Transport-glucose is the form that carbohydrates are carried in blood 3) Building Block- makes up polysaccharides e.g.starch,glycogen.cellulose,etc.
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Examples of Pentose Sugars
Ribose (found in RNA) Deoxyribose (found in DNA)
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How are Disaccharides formed?
Formed when 2 monosaccharides are joined together by a Glycosidic bond (C-O-C). This is condensation reaction-so water is removed
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Give examples of Dimers
Maltose,Sucrose and Lactose
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Maltose
is a glucose 1-4 glucose, formed from digestion of amylase-amylase breaks starch into 2 glucose units
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Sucrose
is a glucose 1-2 fructose, common in plants cos its less reactive than glucose & its their main transport sugar.Plants use sucrose as its a non-reducing sugar (less reactive)
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Lactose (milk sugar)
is a galactose 1-4 Glucose, only found in mammalian milk,main source of energy for infant mammals
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