Question

The reducing sugar among the following is:

• A. sucrose
• B. cellulose
• C. starch
• D. glucose

Answer 1

The correct option is D glucose

A reducing sugar is any sugar that is capable of acting as a reducing agent because it has a free aldehyde group or a free ketone group.

All monosaccharides are reducing sugars because all monosaccharides have an aldehyde group (if they are aldoses) or can tautomerize in solution to form an aldehyde group (if they are ketoses).

This includes common monosaccharides like galactose, glucose, glyceraldehyde, fructose, ribose, and xylose.

Option D is correct.