First slide

Disaccharides

Question

Which one given below is a non-reducing sugar?

Easy

A

Glucose
B

Maltose
C

Sucrose
D

Lactose

Solution

All monosaccharides whether aldoses or ketoses are reducing sugars. Disaccharides such as sucrose in which the two monosaccharide units are linked through their reducing centre i.e., aldehydic or ketonic groups are non-reducing. sucrose does not have a free anomeric hydroxyl group

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