Question

The polysaccharide xylan (“ZAI-lan”) makes it harder for enzymes to break down this structure. These structures contain alternating residues of the monomers NAG and NAM. (15[3])The pectin-rich middle lamella is the outermost layer of this structure. Turgor pressure (-5[1])causes the (15[1])(*) stiffness (10[1]-5[1])of this structure. (10[2])In bacteria, this structure is exposed to crystal violet during Gram staining, which determines the amount of peptidoglycan it contains. In fungi, this structure is composed of chitin, while in plants, it is made up of cellulose. For 10 points, name this rigid layer of the cell which surrounds the cell (10[1])membrane. ■END■ (10[2])

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