Cellulose:-
It is the main constituent of plant cell walls and the most common and abundant of the D-glucose polymers. This does not occur in the animal body. It is a homopolymer =of glucose like starch, except the linkages joining the glucose units are P(1+4) rather than a(1+4). Hence, cellulose is made up of P-glucose molecules linked by P(1,4) glycosidic linkage.