Cellulose, found exclusively in plants and a major component of plant cell walls, is composed of straight-chain b-D-glucose units joined by glycosidic linkage between C₁ of one unit and C₄ of the next. It serves a structural role in the ...

Starch, the main storage polysaccharide in plants, consists of two components: amylose (15-20%) and amylopectin (80-85%). Amylose is a water-soluble, unbranched chain polymer of a-D-glucose units linked by C₁– C₄ glycosidic linkage.

Polysaccharides primarily serve as food storage or structural materials. They are commonly encountered in nature due to their abundance and diverse roles.