Which list correctly identifies the four major macromolecule groups?

• A. Carbohydrates, Lipids, Nucleic Acids, Vitamins
• B. Carbohydrates, Amino Acids, Nucleic Acids, Lipids
• C. Proteins, Nucleic Acids, Minerals, Water
• D. Carbohydrates, Lipids, Proteins, Nucleic Acids

Answer: (D)

The four major macromolecule groups are carbohydrates, lipids, proteins, and nucleic acids. These are the large, essential biomolecules that cells build to perform a wide range of functions. Carbohydrates supply immediate energy and can also form structural components. Lipids store longer-term energy and make up cell membranes, providing barriers and signaling roles. Proteins carry out countless tasks, from catalyzing reactions as enzymes to transporting molecules and supporting structure. Nucleic acids store genetic information and direct the synthesis of proteins.

Other listed options include items that aren’t macromolecules. Vitamins are small organic molecules, amino acids are the monomers that make up proteins, minerals are inorganic elements, and water is a simple molecule, not a macromolecule. That’s why the set with carbohydrates, lipids, proteins, and nucleic acids is the correct identification.