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When an RNA virus infects a human host cell, it uses its own viral transcriptase to produce messenger RNAs (mRNAs) suitable for translation by host ribosomes.

Which of the following processes would NOT occur during the typical production of viral mRNAs?


Addition of a 5' 7-methyl guanine cap.


Splicing of the RNA transcript to remove introns.


Addition of a poly A tail.


Export from the nucleus through a nuclear pore.

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