What is the monomer of nucleic acids?

Nucleic acids, such as DNA and RNA, are polymers made up of repeating units called nucleotides. Each nucleotide consists of three components: a phosphate group, a sugar (deoxyribose in DNA and ribose in RNA), and a nitrogenous base. This structure allows nucleotides to form long chains that create the backbone of nucleic acids, where the sugar and phosphate groups connect, while the nitrogenous bases provide the genetic information.

In the context of the other choices, amino acids serve as the building blocks of proteins, fatty acids are components of lipid molecules, and simple sugars are the monomers for carbohydrates. Each of these components plays unique roles in biological processes and structures but does not pertain to the structure of nucleic acids. Thus, recognizing nucleotides as the monomer of nucleic acids is fundamental to understanding their structure and function in genetics.