Final answer:
Cellulose and hemicellulose are important in industrial purposes, such as paper production and biofuel production.
Step-by-step explanation:
Cellulose and hemicellulose play important roles in various industrial applications. Cellulose is the primary component of plant cell walls and is commonly used in the manufacture of paper and paper products. It is also used as a source of biofuel production, where cellulose is broken down into sugars that can be fermented to produce cellulosic ethanol. Hemicellulose, on the other hand, is a complex carbohydrate that provides structural support to plant cell walls. It is used in industries for the pretreatment of biomass for biofuel production. By breaking down hemicellulose, the biomass becomes more accessible for further processing into biofuels.