👉 The term "nucleic acid" is a biological term that refers to any molecule composed of two or more types of nucleotides. These nucleotides are the building blocks of DNA and RNA, which are the primary components of all living cells. Nucleic acids include DNA (deoxyribonucleic acid), which contains genetic information encoded by specific sequences of A, T, C, G, and Uracil (U) atoms; and RNA (ribonucleic