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maltoseA disaccharide composed of two glucose molecule joined by a 1–>4 bond via a condensation reaction when amylase breaks down starch, as occurs in germinating seeds such as barley.
sugar(shug'ar) [Ult. fr. Arabic sukkar via L. succarum]
Sugars are classified in two ways: the number of atoms of simple sugars yielded on hydrolysis by a molecule of the given sugar and the number of carbon atoms in the molecules of the simple sugars so obtained. Therefore, glucose is a monosaccharide because it cannot be hydrolyzed to a simpler sugar; it is a hexose because it contains six carbon atoms per molecule. Sucrose is a disaccharide because on hydrolysis it yields two molecules, one of glucose and one of fructose.See: carbohydrate