Intermediate and late transcripts from poxviruses have a unique "poly(A) head" near the 5' end of the mRNA.What is the proposed function for this structure?
A) It binds to the poly(A) tails at the 3' end of the mRNA.
B) It stabilizes and protects the 5' end of the genome.
C) It aids in recognition of the AUG start codon by ribosomes.
D) It helps the nascent transcript bind to the viral RNA polymerase during transcription.
E) It associates with the cap binding complex.
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