A very large organic molecule made up of chains of smaller molecules is called a polymer.

Here's why:

* Polymer: The word "polymer" comes from the Greek words "poly" (many) and "meros" (part). It refers to a large molecule made up of repeating smaller units called monomers.

* Monomer: The individual building blocks that link together to form a polymer.

Examples of polymers:

* Proteins: Made up of chains of amino acids.

* Carbohydrates (like starch): Made up of chains of sugars.

* Nucleic Acids (DNA and RNA): Made up of chains of nucleotides.

* Plastics: Many synthetic plastics are polymers.

Let me know if you have any other questions!