What forms the backbone of DNA and RNA?

The backbone of DNA and RNA is formed by nucleotides, which consist of a sugar molecule, a phosphate group, and a nitrogenous base. In DNA, the sugar is deoxyribose, while in RNA, it is ribose. The sugar and phosphate groups bond together to create a long chain, which serves as the structural framework of the nucleic acid. This backbone is crucial because it provides the stability and integrity needed for the genetic information to be stored and transmitted.

While proteins, carbohydrates, and fats are important biomolecules in biological systems, they do not play a direct role in creating the backbone of nucleic acids.