Polysaccharides is the polymer made from sugar monomers; the polysaccharides starch and glycogen are polymers of glucose monomers. Polysaccharides has three kinds; starch, glycogen and cellulose.
Starch
Starch is ready storage forms of glucose in plants. Starch has fewer side branches, or chains of glucose that branch off from the main chain, than does glycogen. Flour, which we acquire by grinding wheat and use for baking, is high in starch, and so are potatoes.
Glycogen
Glycogen is a highly branched polymer of glucose molecules. Glycogen is the storage form of glucose in animals.
Cellulose
Cellulose is found in plant cell walls. In cellulose, the glucose units are joined by different type of linkage than that in starch or glycogen. (Position of the oxygen atoms alternate in linked glucose units.) Cellulose in cell walls permits non-woody plants to stand upright as long as they receive an adequate supply of water.
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