Question

which macromolecules listed rely on carbon as their backbone?
acids and bases
vitamins and minerals
water and salts
carbohydrates, proteins, lipids, and nucleic acids

Explanation:

Macromolecules are large molecules. Carbohydrates, proteins, lipids, and nucleic acids are organic macromolecules. Organic compounds are based on carbon. Carbon can form long chains and complex structures, which serve as the backbone for these macromolecules. Acids and bases, vitamins and minerals, water and salts are not macromolecules with carbon as the backbone in the context of biological macromolecules.

Answer:

Carbohydrates, proteins, lipids, and nucleic acids.