Carbohydrates are one of the of the four biological molecules in living systems. They consists of simple units called monosaccharide, or commonly called simple sugars. The polymers of carbohydrate are made up of thousands of these monosaccharides linked together via a glycosidic bond.
For example, the starch molecule is a carbohydrate polymer made up of hundreds to thousands of glucose molecules (monosaccharide) linked together. Hence, a long chain carbohydrate made up of series of monosaccharide like starch is called a POLYSACCHARIDE i.e. many saccharides or simple sugar unit
