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Question

List IList II(A) Sucrose(i) βD-glucose                            C1C4 glycosidic linkage(B) Lactose(ii) αD-glucose,βD-fructose C1C2 glycosidic linkage(C) Cellulose(iii) βD-glucose,βD-galactose C1C4 glycosidic linkage
List-I contains saccharides and List-II contains the monosaccharide units as well as glycosidic bonds.
Choose the correct option considering List-I and List-II.
  1. A - (iii), B - (ii), (C) - (i)
  2. A - (iii), B - (i), (C) - (ii)
  3. A - (ii), B - (iii), (C) - (i)
  4. A - (i), B - (ii), (C) - (iii)


Solution

The correct option is C A - (ii), B - (iii), (C) - (i)
(A) In sucrose, αD-glucose and βD-fructose are held together by C1C2 glycosidic linkage where C1 is on the glucosyl subunit and C2 is on the fructosyl unit.

(B) In lactose, βD-galactose and βD-glucose are held together by C1C4 glycosidic linkage where C1 is on the galactosyl subunit and C4 is on the glucosyl unit.

(C) Cellulose is polysaccharide containing linear chain of several βD-glucose units through C1C4 glycosidic linkage.

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