While DNA does contain carbon and hydrogen, it is a nucleic acid, not a hydrocarbon. Here's why:

* Hydrocarbons consist solely of carbon and hydrogen atoms. They are typically nonpolar and hydrophobic (don't dissolve in water).

* DNA is a complex molecule containing:

* Deoxyribose sugar: This is a sugar molecule with carbon, hydrogen, and oxygen atoms.

* Phosphate groups: These contain phosphorus, oxygen, and some hydrogen.

* Nitrogenous bases: These are organic molecules containing nitrogen, carbon, hydrogen, and oxygen.

The presence of these additional elements, particularly oxygen and nitrogen, distinguishes DNA from hydrocarbons.