Cell wall of which one of these is not made up of cellulose?
(a) Bacteria
(b) Hydrilla
(c) Mango tree
(d) Cactus
Explanation: Cellulose is a polysaccharide (long chain of sugars or complex sugar) that is found in the cell wall of plants which gives rigidity and protects the cell. So, in the above options; hydrilla, mango tree, and cactus belong to plants but bacteria do not. Bacteria cell wall is made up of peptidoglycan which is also a polysaccharide. Hence, (a) is the correct option.