Final answer:
Lipids are the class of biomolecules that do not have covalent bonds. Lipids are nonpolar organic compounds built from hydrocarbons and are not soluble in water.
Step-by-step explanation:
Macromolecules are large molecules formed by covalent bonding.
The four major classes of biological macromolecules are proteins, carbohydrates, nucleic acids, and lipids.
Out of these four classes, lipids do not have covalent bonds.
Lipids are nonpolar organic compounds built from hydrocarbons and are not soluble in water.