An example of a natural polymer is cellulose, which is a complex carbohydrate found in the cell walls of plants. Cellulose is made up of long chains of glucose units linked by β-1,4-glycosidic bonds. This natural polymer is essential for providing structural support to plants and is a significant component of dietary fiber in human nutrition. Understanding cellulose and other natural polymers is critical in fields like biochemistry, materials science, and sustainable resources.