Polysome organization &
elongation of polypeptide chain
Multiple ribosomes
may attach to a single mRNA, and translate the
message as the move along it in the usual 5'
3' direction. Thus the 3'
end of the mRNA carries the ribosomes that have been
attached the longest, with the longest polypeptides, and the 5'
ends carries the newly-attached ribosomes with the
shortest.