Question

The functional groups characteristic of sugars are :

• A. Carbonyl and phosphate
• B. Carbonyl and methyl
• C. Hydroxyl and methyl
• D. Carbonyl and hydroxyl
  

Answer 1

The correct option is D Carbonyl and hydroxyl

Carbohydrates are polyhydroxy aldehydes or ketones, or substances that yield such compounds on hydrolysis. Hydroxyl groups are a functional group found in sugars and alcohols

Aldehydes and ketones are both carbonyl compounds. A carbonyl group is a chemically organic functional group composed of a carbon atom double-bonded to an oxygen atom --> [C=O].

A hydroxyl group is a functional group consisting of a hydrogen atom covalently bonded to an oxygen atom.

The functional groups characteristic of sugars are: Carbonyl and hydroxyl