Stop codonplugin-autotooltip__default plugin-autotooltip_bigCodon: a three nucleotide sequence that is read by the ribosome and specifies an amino acid that is added to a growing poplypeptide chain based on the genetic code.: a codonplugin-autotooltip__default plugin-autotooltip_bigCodon: a three nucleotide sequence that is read by the ribosome and specifies an amino acid that is added to a growing poplypeptide chain based on the genetic code. that instructs 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. to terminate translationplugin-autotooltip__default plugin-autotooltip_bigProtein translation: the process of using an mRNA as a template to synthesize a protein based on the genetic code, using ribosomes.. Stop codons are UGA, UAG, or UAA in the universal 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.