First slide

Introduction

Question

Which one of the following is a non reducing sugar

Easy

A

Glucose
B

Fructose
C

Sucrose
D

Maltose

Solution

A) All monosaccharides are reducing sugars;
B) All polysaccharides are non reducing non sugars;
C) Disaccharides like maltose and lactose are reducing sugars;
D) Sucrose is a non reducing sugar because it does not contain free aldehyde group or anomeric -OH group;
A glycosidic linkage is present between C-1 of $α -$ D-glucose and C-2 of $β -$ D-fructose;
No free -OH group is present on functional group(anomeric) carbon;

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