Comparative chart for cellulose, starch and glycogen

Cellulose

Starch

Glycogen

Cellulose is solely found in the plant only and is absent in vertebrates. In plants, it acts as the structural component and is present in the cell wall, especially in trunks, the woody area of the plants.

Glycogen, often termed as animal starch, though found in plants that do not contain chlorophyll like yeast, fungi, etc. It is also the homopolysaccharide having the glycogen bonds or linkages similar to that of the amylopectin, with the more branches.

Another type of polysaccharide, acting as the chief carbohydrate reserve for the plants, and the principal dietary source for the animals and humans. Starch occurs in two types of polymer amylose and amylopectin

These three polysaccharides differ in their glycosidic linkages and their functions too. Starting from the cellulose which is the monomer of beta glucose and is found in plant cell wall only. While Starch and Glycogen act as the carbohydrate reserve in plants and animals respectively.