Are cell walls made of cellulose?
In plants, the cell wall is made mostly of a strong material (polysaccharide) called, cellulose. Cellulose is wound into microfibrils which provide structural support.
Plants, algae, fungi and bacteria all have cell walls. Animal cells do not have cell walls. Plants have cell walls made of cellulose, hemicellulose and pectin. In true fungi they are usually made of chitin, in algae they are made of a polysaccharide (like cellulose) or a glycoprotein, and bacteria have a peptidoglycan wall.