Final answer:
The building blocks of nucleic acids are nucleotides. These compounds contain a five-carbon sugar, a phosphate group, and a nitrogen-containing base.
Step-by-step explanation:
The building blocks of nucleic acids are nucleotides. Nucleotides are compounds that contain a five-carbon sugar, a phosphate group, and a nitrogen-containing base. These components are found in both DNA and RNA, which are nucleic acids responsible for storing and transmitting genetic information.