Final answer:
Starch is a complex carbohydrate polymer composed of glucose monomers. It is the main source of dietary energy for humans and is stored in plants as long chains of glucose molecules bound together.
Step-by-step explanation:
Starch is a complex carbohydrate polymer composed of glucose monomers. It is made up of both amylose and amylopectin, which are linked by glycosidic linkages. Starch is the chief carbohydrate present in plants and serves as the main source of dietary energy for humans. It is stored in the form of long chains of glucose molecules bound together.