-Polysaccharide
Polysaccharide are polymers whose submit are monosaccharide. They made by joining many monosaccharide molecule by condensation. Each successive monosaccharide is added by means of a glycosidic bond or disaccharides. The most important polysaccharides are starch, glycogen and cellulose, all which are polymer of glucose, polysaccharide are not sugar. Glucose is also a reactive molecule and would interfere with normal cell. These problem are avoided by converting glucose, by condensation reaction to a storage pollysaccharide. The storage polysaccharide formed is starch in plant and glycogen in animal.
o Starch and glycogen
starch is a mixture of amylose and amylopectin. Amylose is made by condensation between alpha-glucose. starch is never found in animal cells, a substance with molecule very like those of amylopectin is used as the storage carbohydrate, and this is called glycogen.
o Cellulose
Cellulose is the most abundant organic on the planet, due to its presence in plant cell walls and its slow rate of breakdown in nature, cellulose is a polymer of beta-glucose and alpha-glucose.
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