Cellulose is the main ingredient of plant cell walls (mass fraction about 50 percent) and thus represents the most common organic compound as well as the most common polysaccharide (multiple sugars). It is unbranched and consists of several hundred to ten thousand ß-d-glucose molecules or cellobiose units. The cellulose molecules combine into aggregates in higher structures, which often perform static functions as tear-resistant fibers in plants. Cellulose plays an important role as a raw material for paper production, but also in the chemical industry and other segments.