Identify the following sugar as reducing sugar(RS) or non-reducing sugar(NS)

• A. Reducing sugar
• B. Non-reducing sugar

Answer: (B)

Verified step by step guidance

1. Identify the sugar structure in the image. The structure shown is a disaccharide composed of two monosaccharide units linked together.
2. Examine the glycosidic bond between the two sugar units. In this structure, the bond is an acetal linkage, which involves the anomeric carbon of one sugar.
3. Determine if the anomeric carbon of the second sugar unit is free or involved in a glycosidic bond. In this structure, both anomeric carbons are involved in glycosidic bonds.
4. Understand that a reducing sugar must have a free anomeric carbon that can open to form an aldehyde or ketone group, which can reduce other compounds.
5. Conclude that since both anomeric carbons are involved in glycosidic bonds and there is no free anomeric carbon, the sugar is a non-reducing sugar.