Starch is not a single component. It consists of amylose and amylopectin. In contrast, cellulose is a single compound. Amylose is a linear polymer of α - D glucose while cellulose is a linear polymer of β -D glucose. In amylose, C1 - C4 α- glycosidic linkage is present, whereas in cellulose C1 - C4 β- glycosidic linkage is present. Amylopectin has a highly branched structure.
