Monosaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule is also considered for classification. In which class of monosaccharide will you place fructose?
Monosaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule is also considered for classification. In which class of monosaccharide will you place fructose?

Carbonyl groups can be found in monosaccharides. As a result, they’re categorised as either aldose or ketose.
Aldose refers to monosaccharides that contain an aldehyde group. Ketose refers to monosaccharides that contain a ketone group. Fructose, also known as ketohexose, has the chemical formula C6H12O6 and contains six carbon atoms and a keto group.