21. An mRNA molecule
codifies only one type of
protein?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Eukaryotic cellshave monocistronic
, i.e., each mRNA only
one polypeptide . Prokaryotes can
present mRNA.
At the of the assembling amino
acids into polypeptide chain, the
, by one of terminal codons,
signalsto ribosome that the
is complete. The
then liberates the protein. In
prokaryotes this conclusion the
for the beginning the
synthesis of different protein
may in the same .