Question

Which is not true for reducing and non reducing sugars?

• A. Both depends on the position of linkage between two monosaccharides unit
• B. Sucrose is a non reducing sugar, as linkage involves the carbonyl functional group of both monosaccharides units
• C. Maltose and Lactose are reducing sugar, as one of the carbonyl functional group in any one of the monosaccharides unit is free
• D. Maltose is reducing sugar while lactose and sucrose both are non reducing sugar

Answer 1

The correct option is D Maltose is reducing sugar while lactose and sucrose both are non reducing sugar

Reducing sugars are sugars where the anomeric carbon has an $OH$ group attached that can reduce other compounds.
A disaccharide can be a reducing or non-reducing sugar.
Maltose and Lactose are reducing sugars and sucrose is non-reducing sugar.