Golgi bodies , Lysosomes . These are complex molecules containing carbon. They usually contain hydrogen and oxygen too. They may contain other elements such as phosphorus, nitrogen or sulphur. Sometimes metals are associated with organic molecules to assist in their biological activity.
Organic molecules range in size form relatively small to very large.
You should also understand how these molecules combine together to form the common macromolecules. These compounds are generally not based on carbon, although some have carbon in them. They are generally smaller molecules than are organic compounds. They are often able to cross most cell membranes easily. Examples are water, carbon dioxide, mineral ions.