Question

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

Explanation:

Macromolecules like carbohydrates, proteins, lipids, and nucleic acids are organic compounds. Organic compounds are based on carbon skeletons. Water, salts, acids, bases, vitamins, and minerals are inorganic and do not have carbon as their backbone.

Answer:

Carbohydrates, proteins, lipids, and nucleic acids