After the mRNA has exited the nucleus through the nuclear pores. Translation begins with the mRNA entering the ribosome. Next tRNA uses its three unpaired bases to bond with a specific amino and bring it to the ribosome. The tRNA then forms hydrogen bonds between its anticodon and the complimentary bases on the mRNA. Two tRNA molecules bond to the mRNA strand at once so that the two amino acids can form peptide bonds (using ATP). The ribosome then moves along the mRNA to assemble the next amino acid whilst the tRNA returns to the cytoplasm