Starch’s structure is composed of the two compounds amylose and amylopectin. The chemical formula for starch is (C6H10O5)n. Starch is a polysaccharide that consist of glucose monomers.
Starch is produced from excess glucose that is created from the green leaves of plants during photosynthesis. It is the plant's reserve food supply and is stored as granules in chloroplasts. Starch is also stored in different plant organs, such as the tuber of a potato and the seeds of corn, wheat and rice. Starch is broken down into monomer glucose units by certain enzymes and water when needed in plants. In humans and animals, starch is broken down into sugar molecules that supply energy to tissues.