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A Researcher Purifies Numerous Different Eukaryotic MRNA Species and Carries

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A researcher purifies numerous different eukaryotic mRNA species and carries out nucleic acid hybridization to identify the genes encoding the various mRNAs.As expected, the presence of exons within the genomic DNA creates regions in which there is no mRNA sequence to hybridize with the DNA.The researcher also notes that at the 3′ end of all of the mRNA species, there are RNA sequences that fails to anneal with the DNA.The researcher concludes that these RNA sequences must correspond to _______.

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