Here's why:

* Cholesterol is a lipid (fat): It's a type of steroid, a specific kind of fat molecule.

* Nucleic acids are polymers of nucleotides: These are complex molecules composed of a sugar, a phosphate group, and a nitrogenous base.

* Functions: Cholesterol plays a vital role in cell membranes, hormone production, and other bodily functions. Nucleic acids, on the other hand, carry genetic information (DNA) and are involved in protein synthesis (RNA).

Let me know if you have any other questions!