COMEDK2023Evening ShiftChemistryBiomoleculesActual
Choose the incorrect statement regarding Cellulose.
Options
- AIt does not reduce Fehling's solution nor Tollen's reagent.
- BIt is a straight chain polysaccharide made of - D -glucose units.
- CThe -glycosidic linkages are between C₁ of one Glucose unit and C₅ of the next Glucose unit.
- DOn heating with dil. H ₂ SO ₄ under pressure, Cellulose gets hydrolysed to D-Glucose.
Correct answer
C. The -glycosidic linkages are between C₁ of one Glucose unit and C₅ of the next Glucose unit.
Step-by-step solution
Cellulose is a linear polysaccharide composed of -D-glucose units linked together by -glycosidic linkages. The -glycosidic linkage in cellulose occurs between the C₁ carbon of one -D-glucose unit and the C₄ carbon of the adjacent -D-glucose unit, not the C₅ carbon. Cellulose is a non-reducing sugar because the glycosidic linkage involves the anomeric carbon ( C₁ ), preventing the formation of an open-chain structure with a free aldehyde group. Thus, it does not reduce Fehling's solution or Tollen's reagent. Complet