mRNA molecule-kind of protein

An mRNA molecule codifies just one kind of protein?

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Eukaryotic cells contain monocistronic mRNA, that is, each mRNA codifies just one polypeptide chain. Prokaryotes can exist polycistronic mRNA. At the end of assembling of amino acids into a polypeptide chain, that is, the mRNA, by one of its terminal codons, signals to ribosome that the polypeptide is finished. The ribosome then releases the produced protein. In prokaryotes subsequent to this conclusion the information for the starting of the synthesis of other different protein might follow in similar mRNA.

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