The very large organic compound made up of chains of smaller molecules is called a polymer.

Here's a breakdown:

* Polymer: A large molecule made up of many repeating smaller units called monomers.

* Monomer: A small molecule that can join with other monomers to form a polymer.

Some common examples of polymers include:

* Proteins: Made up of chains of amino acids.

* Carbohydrates: Made up of chains of sugar molecules (monosaccharides).

* DNA and RNA: Made up of chains of nucleotides.

* Plastics: Made up of chains of synthetic monomers.

Let me know if you'd like to learn more about a specific type of polymer!