A non-reducing sugar “A” hydrolyses to give two reducing mono saccharides. Sugar A is:
Biomolecules · Class 12 · JEE Main Previous Year Question
A non-reducing sugar “A” hydrolyses to give two reducing mono saccharides. Sugar A is:
- a
Galactose
- b
Fructose
- c
Glucose
- d✓
Sucrose
Sucrose
Step 1: Non-reducing Nature — A non-reducing sugar has all its anomeric carbons involved in glycosidic linkages, preventing the ring from opening.
Step 2: Sucrose Hydrolysis — Sucrose is a non-reducing disaccharide. Upon hydrolysis, it splits into its component monosaccharides: glucose and fructose.
Step 3: Final Product — Since both glucose and fructose are reducing monosaccharides, sucrose fits the description of sugar 'A'.
Key Point: Sucrose is non-reducing because the glycosidic bond connects the anomeric carbons of both units ( of glucose and of fructose).
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