Poysaccharides are carbohydrate polymers (e.g. starch, cellulose, or glycogen) which are made up of more than $10$ sub-units of monosaccharide molecules join together.Starch, glycogen and cellulose are polysaccharides of glucose. Maltose, sucrose and lactose are disaccharides, while, fructose and galactose are monosaccharides.