3. Carbohydrates are polymers of monosaccharides. (a) Name the polysaccharide th

Question

3. Carbohydrates are polymers of monosaccharides.

(a) Name the polysaccharide that provides strength and rigidity to bacterial cell walls.

(b) Name the monosaccharide unit (s) that polymerize to makes up the polysaccharide in (a).

(c) What is the glycosidic linkage of the backbone polymer in (c)?

(d) (i) Starch and Glycogen function as ____________________ polysaccharides.

(ii) Polysaccharides such as ___________________ and ___________________ serve as structural

molecules.

(iii) Cell surface polysaccharides such as ___________________ and ___________________ have a

role as ___________________ molecules.

(iv) ___________________________ are polysaccharides that provide strength and rigidity.

Explanation / Answer

(a) Peptidoglycan.

(b) N-acetylglucosamine and N-acetylmuramic acid.

(c) It's a beta glycosidic bond, i.e., positions 1, 4.

(d) (i) Starch and glycogen function as carbohidrate energy storage polysaccharides.

(ii) Polysaccharides such as cellulose and chitin serve as structural molecules.

(iii) Cell surface polysaccharides such as xanthan gum and dextran have a role as barrier molecules.

(iv) Peptidoglycan are polysaccharides that provide strength and rigidity.

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