how does an mrna molecule specify where the polypeptides it encoded should begin
-a complex is formed b/w an mRNA molecule, the first tRNA molecule, and the ribosomal subunits-assembly of the complex requires initiation factors and an input of energy (GTP) -To begin in bacteria, mRNA binds to the small ribosomal subunit which is facilitated by a short ribosomal binding sequence near the 5' end.a complex is formed b/w an mRNA molecule, the first tRNA molecule, and the ribosomal subunits-assembly of the complex requires initiation factors and an input of energy (GTP) -To begin in bacteria, mRNA binds to the small ribosomal subunit which is facilitated by a short ribosomal binding sequence near the 5' end.