Codon: a three nucleotideplugin-autotooltip__default plugin-autotooltip_bigNucleotide: molecules that are polymerized to form nucleic acids (DNA or RNA). Includes dNTPs and NTPs. sequenceplugin-autotooltip__default plugin-autotooltip_bigSequence: the precise order of monomers in a polymer. In DNA, it refers to the order of G, A, T, and C nucleotides. In RNA, it refers to the order of G, A, U, and C nucleotides. In proteins, it refers to the order of amino acids. that is read by the ribosomeplugin-autotooltip__default plugin-autotooltip_bigRibosome: a very large and complex enzyme formed from both protein and rRNA subunits. Its primary function is to catalyze translation. and specifies an amino acidplugin-autotooltip__default plugin-autotooltip_bigAmino acid: molecules that are polymerized to form proteins. that is added to a growing poplypeptide chain based on the genetic codeplugin-autotooltip__default plugin-autotooltip_bigGenetic code: the code that matches codons with specific amino acids. Since each codon is 3 nucleotides long (i.e., the genetic code is a triplet code) and there are 4 different RNA nucleotides (G, A, U, and C), the genetic code could in theory specify up to $4^3=64$ different amino acids. But since there are only 20 different.