The difference between Amino Acid and Nucleic Acid are Amino acid are composed of one carboxyl group and one or more amino groups whereas Nucleic acid are composed of pentose, sugar, nitrogenous base and phosphate group.
Nucleic acids are macromolecules composed of many (polymers) small sub-units called nucleotides. There are two types of nucleic acids i.e. DNA (deoxyribonucleic Acid) and RNA (Ribo nucleic Acid). They are the chemical constituents of the chromosomes. These nucleic acids were first discovered by a Swiss biochemist Friedrich Meischer in 1871.