Cellulose is a carbohydrate (made up of carbon and and hydrogen atoms). This is common component of cotton and wood. It is also a major component of plant cell walls Cellulose is a polymer that is composed of 3000 or more than 3000 glucose monomers linked together through β(1→4) D-linkage.
It is considered to be one of the most abundant polymers of organic nature on the earth.
It has a number of commercial uses like:
Manufacturing of paper and paper based products.
In scientific labs for conducting thin layer chromatography.
Since they are now able to genetically isolate favorable traits they can "clone" prize-winning livestock and make the production as efficient as possible