Starch
It is a plant polysaccharide synthesized by the plant by photosynthesis and stored mainly in grains, legumes, roots and tubers. Its molecular formula is (C6H1OO5)n. Starch consists of two forms, amylose and amylopectin. Normally, 65-85% of the starch is amylopectin and only 15-35% is amylose. Amylose has a straight chain structure formed by 250-300 glucose residues linked together by (1,4) glycosidic linkage