Living things, or organisms such as plants and animals, are made of uncountable numbers of molecules. But one thing they all have in common is they contain carbon atoms.
Life on earth is based on carbon compounds that we call biomolecules.
Biomolecules are macromolecules or “giant molecules.” They are giant because they are polymers made of hundreds or even thousands of smaller molecules,monomers.
Polymers are like a brick wall, made up of many monomers, in this case bricks
Four of the major kinds of biomolecules are carbohydrates, lipids, proteins and nucleic acids.