Now, this is all great in prokaryotes.
As the little green dots,
the RNA polymerases here are
transcribing the RNA strand,
recall that the prokaryotic cells,
bacterial cells do not have a nucleus.
And so the ribosomes have
direct access to the strands
and will begin to translate them
as they are being transcribed,
which is a pretty cool system.
So we have multiple RNA polymerases
polymerizing RNA strands
and multiple ribosomes on those messenger
RNA strands getting right to work,
translating them into their
So we call these polyribosomes,
because there are many of
them on each messenger RNA
and they are producing polypeptide
strands that are fairly fast rate
and they tend to look like under a
microscope little Christmas trees.
So the longer strands
are by the ribosomes
that have been on the
messenger RNA the longest.
And as the messenger RNA is being produced,
they are climbing up it essentially.
The ones on the end have
shorter polypeptide chains
because they’ve had less time and less
of the mRNA to transcribe so far.
So now we need to look at little bit at
eukaryotes and how things are different.