Cellulose is a complex homopolysaccharide. The cell wall of autophagous plants is composed of cellulose. Cellulose is the most abundant organic material on Earth. Glucose is obtained by wet analysis of cellulose with hydrochloric acid or sulfuric acid or sodium hydroxide. Cellulose molecules contain β-1-4 glycosidic linkages. Neither animals nor humans can digest cellulose because they have no enzymes to break these β-1-4 glycosidic bonds. French chemist Anselme Payen (1838) discovered cellulose. Kobayashi & Shoda (1992) first produced synthetic cellulose. Dr. Siddiq Publications