Bio 1 — Introduction to Biological Macromolecules + 6 more topics

Life as we know it depends on four major types of organic molecules: carbohydrates, lipids, proteins, and nucleic acids. These are called macromolecules because they're large, complex molecules, and they're also often referred to as polymers because they're generally made up of many repeating smaller units called monomers. Think of it like a chain (polymer) made of many identical or similar links (monomers).