A carbohydrate with an aldehyde functional group is called:

A. disaccharide

B. aldose

C. hexose

D. ketose

Answer: The correct answer is Aldose.

A disaccharide is produced when two monosaccharides are linked by a glycosidic bond. Any carbohydrate which has six carbon atoms is called as hexose. It is a monosaccharide. The functional group in hexose can be aldehyde or ketone. Ketose is a carbohydrate which contains ketone as a functional group.

Aldose, as the name suggests, it means having aldehyde group. Thus, it is a carbohydrate which has aldehyde as a functional group.

Example - D - Glyceraldehyde.