Before you read this, I suggest you read post 20.38. Cells (post 16.18) in plants are surrounded by a rigid wall made of the polysaccharide (post 20.38) cellulose that consists of repeating β-D-glucose residues (post 20.38) as shown above. In this picture, the second residue is identical to the first but I have shown it… Continue reading 20.40 Polysaccharides