The building blocks of carbohydrates are mainly of three types:
Monosaccharides are considered to be simplest building block of carbohydrates and also the basic unit of oligosaccharide and polysaccharide. E.g. glucose, fructose and galactose . It is simplest sugar as no hydrolysis is possible. Used as a source of energy.
Oligosaccharides after hydrolysis gives 2-20 monosaccharides. E.g. sucrose, lactose, maltose
Polysaccharides are made up more than 20 monosaccharides. Used to store energy. E.g. starch and glycogen.
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