Question

Which of the following is a non-reducing sugar?

• A. Maltose
• B. Lactose
• C. Glucose
• D. Sucrose

Hint:

Non-reducing sugars, like sucrose, do not have a free aldehyde or ketone group and do not reduce other compounds.

Answer 1

The Correct Option is D

Sucrose is a non-reducing sugar because it does not have a free aldehyde or ketone group that can act as a reducing agent. It is formed by the combination of glucose and fructose through a glycosidic bond between their anomeric carbons. This bond prevents sucrose from participating in reducing reactions, unlike maltose and lactose, which are reducing sugars.