What is the nature of the biomolecule carbohydrate?
Carbohydrate is a group of molecules, commonly called sugar/saccharide.
Carbohydrate molecules are made up of carbon, hydrogen and oxygen: the ratio of atoms of hydrogen and oxygen is always 2:1.
Monosaccharide units join together to form polysaccharide. For example, glucose units form starch and glycogen; whereas fructose units form inulin. All these are included under carbohydrate.