All those carbohydrates which contain a free aldehyde or ketonic group and reduce Fehling's solution and Tollen's reagent are referred as a reducing sugar. Examples of reducing sugar are galactose, glucose, glyceraldehyde, fructose, ribose, and xylose. Non-reducing sugars do not have an OH group attached to the anomeric carbon so they cannot reduce other compounds. All monosaccharides such as glucose are reducing sugars. Examples Sucrose, Trehalose, Raffinose, Stachyose. A Caution ⇒ The anomeric carbon is the carbon derived from the carbonyl carbon compound (the ketone or aldehyde functional group) of the open-chain form of the carbohydrate molecule. The anomeric carbon can be determined by the carbon attached to two oxygen atoms joined by single bonds.
Which one is a reducing sugar?
NEET UG 2002 — Botany Biomolecules
Which one is a reducing sugar?
Held on 30 Apr 2002 · Verified 9 Jul 2026.
Options
- A
Galactose
- B
Gluconic acid
- C
β Methyl galactoside
- D
Sucrose
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