Starch and glycogen are the polymers of glucose.Starch is used for the storage of glucose in plants.it is made of 1-4 linkage for linear chain and 1-6 linkage for branched.glycogen is also a storage form of glucose and it also has 1-4 and 1-6 linkage,but glycogen is mainly used by animals to store glucose and it is highly branched comparing to starch.
Starch is used in plants and glycogen is used in animals
Starch are the storage food of plant cell.whereas cellulose are the store foods of animal cell