Which of the following does not occur before a eukaryotic mRNA is exported from the nucleus?
(a) The ribosome binds to the mRNA.
(b) The mRNA is polyadenylated at its 3' end.
(c) 7-methylguanosine is added in a 5'-to-5' linkage to the mRNA.
(d) RNA polymerase dissociates.
Answer: A