a) Amino acids are small molecules that are the building blocks of proteins
b) Hydrocarbons are molecules that contain only carbon and hydrogen.
c) A carbohydrate is a biomolecule consisting of carbon, hydrogen and oxygen atoms, usually with a hydrogen–oxygen
d) Alcohol is an organic compound with one or more hydroxyl groups.
e) Cholesterol is a waxy type of lipid, a substance that is insoluble in water, like oil or fat.
