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Which of the following BEST describes how the mRNA undergoes a series of modifications after transcription?
A GTP cap and a poly A tail are added to protect the mRNA as it leaves the nucleus.
Splicing of the tRNA occurs to remove excess portions that will not be expressed during translation.
Exons are spliced out from the mRNA and introns are spliced together to make a final mRNA transcript.
Post-transcriptional editing of RNA is performed in both prokaryotes and eukaryotes depending on the gene that is being transcribed.