AnswerNucleic acid is a polymer of nucleotides or nucleoside triphosphate.Nucleotides are made up of 3 units:1. Nitrogenous bases e.g adenine (A), thymine(T), cytosine(C), guanine (G) and uracil(U) 2. Pentose sugar having 5 carbon atoms in a ring e.g ribose sugar. (in RNA) or deoxyribose sugar (in DNA)3. Phosphate group Nucleotides= Nitrogenous base+ Sugar+ phosphate group.Nucleosides= Nitrogenous base + Sugar