<P> In Figure 5 , both ribosomal subunits ( small and large ) assemble at the start codon ( towards the 5 ' end of the RNA ) . The ribosome uses RNA that matches the current codon ( triplet ) on the mRNA to append an amino acid to the polypeptide chain . This is done for each triplet on the RNA , while the ribosome moves towards the 3 ' end of the mRNA . Usually in bacterial cells , several ribosomes are working parallel on a single RNA , forming what is called a polyribosome or polysome . </P>
<P> In Figure 5 , both ribosomal subunits ( small and large ) assemble at the start codon ( towards the 5 ' end of the RNA ) . The ribosome uses RNA that matches the current codon ( triplet ) on the mRNA to append an amino acid to the polypeptide chain . This is done for each triplet on the RNA , while the ribosome moves towards the 3 ' end of the mRNA . Usually in bacterial cells , several ribosomes are working parallel on a single RNA , forming what is called a polyribosome or polysome . </P>
where is the small subunit of the ribosome assembled
where is the small subunit of the ribosome assembled
at the start codon ( towards the 5 ' end of the RNA )
at the start codon ( towards the 5 ' end of the RNA )