Question
The two functional groups characteristic of sugars are
Hydroxyl and methyl
Carbonyl and methyl
Carbonyl and hydroxyl
Carbonyl and phosphate
Solution
C.
Carbonyl and hydroxyl
Sugar is a common term used to denote carbohydrate.
Carbohydrates are a polyhydroxy aldehyde, ketone or their derivatives, which means they have carbonyl and hydroxyl groups.