Messenger RNA is a copy of the relevant section of DNA for
the production of a specific protein. Messenger RNA, or mRNA, is made in the nucleus and
is transported out through a nuclear pore into the
cytoplasm.
Once the mRNA reaches the cytoplasm, ribosomes
attach to it and begin the process of translation. In translation, the ribosomes "read"
the bases along the mRNA, and each group of three bases is used to identify an amino
acid which will become part of the protein. Transfer RNAs brings the called-for amino
acids in sequence, and the ribosomes join them together into the polypeptide. When it is
completed the polypeptide is released into the cytoplasm, after which other cell
processes finish it into a protein. So to summarize, the role of messenger RNA is
instructions for the sequencing of amino acids.
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