Question

Sucrose is a non-reducing sugar because:

• A. The -CHO group of glucose is not involved in glycosidic bond formation.
• B. Sucrose is dextrorotatory
• C. Two monosaccharide units are held together by a glycosidic linkage between C₁ of α-glucose and C₂ of β-fructose.
• D. On hydrolysis, sucrose gives dextrorotatory and laevorotatory and the mixture is laevorotatory

Answer 1

The correct option is C

Two monosaccharide units are held together by a glycosidic linkage between C₁ of α-glucose and C₂ of β-fructose.

Sucrose is a non-reducing sugar because the two monosaccharide units are held together by a glycosidic linkage between C₁ of α-glucose and C₂ of β-fructose. Since the reducing groups of glucose and fructose are involved in glycosidic bond formation, sucrose is a non-reducing sugar.