Discussion
The cell walls of Gram positive bacteria contain two modified sugars, N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM). They are covalently linked by
Answer: D
Correct answer: β- 1,4-glycosidic bond
NAG and NAM alternate along the glycan backbone, joined by β-1,4-glycosidic bonds - the same linkage as in cellulose and chitin, and the one lysozyme hydrolyses. An α linkage, as in starch, would give a quite different, non-structural polymer.
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