Mrna is transcribed in the and then it enters the translation begins when a ribosome to mrna at a specific area (aug). the ribosome starts matching trna sequences to the mrna codon sequence. each trna carries kind of each time a new trna ribosome, the amino acid that it was carrying gets added to the elongating chain. the ribosome continues until to hots a sequence, and then it releases the polypeptide and the mrna. the polypeptide forms into a native shape and starts acting as a functional in the cell.