Place the middle school· biology· 8+4 pts · place the steps for the formation of the enzyme pepsinogen in the correct order. the dna strands unwind, and rna polymerase binds to the template strand. the mrna undergoes intron splicing and exits the nucleus. the trna moves through mrna with the activated amino acids attached to it. the synthesis of mrna begins. the amino acids assemble to form peptide.