What is classified as a macromolecule?

A macromolecule is defined as a large molecule that is typically made up of smaller subunits known as monomers, which are covalently bonded together. This definition encompasses biological macromolecules such as proteins, nucleic acids, carbohydrates, and lipids. Each of these classes of macromolecules plays vital roles in biological systems and serves different functions, from energy storage (as in carbohydrates) to structural support (as seen in proteins and nucleic acids). The complexity and size of macromolecules are key characteristics that differentiate them from smaller molecules or simple compounds.

Understanding the structure and function of macromolecules is essential in fields like biochemistry and molecular biology, as they are crucial for various cellular processes and overall organismal health.