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messenger RNA(mRNA)
a type of RNA named for its function of carrying the genetic code from the nucleus of the cell to the cytoplasm, where most cellular functions take place. The transfer of the genetic code from DNA to mRNA is called transcription. Molecules of mRNA migrate to the ribosomes, where the manufacture of proteins occurs. The strands of RNA contain codons, which specify the sequence of amino acids in the proteins and also signal when formation of a particular protein should
start or stop.

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