What do we call a very large molecule made up from smaller chemical structures?

A macromolecule is defined as a very large molecule that is composed of smaller, repeating units known as monomers, which are linked together through covalent bonds. Common types of macromolecules include proteins, nucleic acids, carbohydrates, and lipids. These molecules play essential roles in biological processes and are fundamental to the structure and function of living organisms.

The term micromolecule, in contrast, refers to smaller molecules that do not fit this definition and are not typically composed of repeating subunits. Compounds consist of two or more elements that are chemically bonded together, but they can vary widely in size and complexity, not all being large molecules. An element is a pure substance that cannot be broken down into simpler substances, consisting of only one type of atom, and does not describe the structure or size of molecules. Therefore, the definition and characteristics of a macromolecule appropriately fit the context of the question.