In general, aminoacylation is a reaction where an aminoacyl group is attached to a compound in certain circumstances. In genetics, when an amino acid molecule attaches with the 3’ terminal of the specific tRNA in presence of the aminoacyl tRNA synthetase, it is called aminoacylation. This process occurs within a cell where a ribosome can transfer specific peptides to a growing chain of a protein with help of a tRNA. All the steps according to a specific genetic code.