Chemistry - Biomolecules Question with Solution | TestHub

Explanation Question:

Question is asking about the non reducing disaccharide is obtained by condensation of X & Y .

Concept:

1. Condensaton between two monosaccharide

2. Glycosidic linkages formed is acetal linkages.

Solution:

Glycosidic linkage involves anomeric carbon of both monosaccharides.

The anomeric carbon of glucose (C₁ ) and the anomeric carbon of fructose (C₂ ) are the carbons that will react to form the glycosidic bond in a non-reducing disaccharide. This is because when these two specific carbons are linked neither sugar can open up to form a free aldehyde or ketone group, which is required for reducing properties.

→ Hence X is glucose & Y is tructose.

→ ∴ C of X and C₂ of Y is involved in glycosidic linakge. 

The correct option is (D)