Which of the following is a function of a poly-A signal sequence? A) It adds the poly-A tail to the 3′ end of the mRNA. B) It codes for a sequence in eukaryotic transcripts that signals enzymatic cleavage ~10?35 nucleotides away. C) It allows the 3′ end of the mRNA to attach to the ribosome. D) It is a sequence that codes for the hydrolysis of the RNA polymerase. E) It adds a 7-methylguanosine cap to the 3′ end of the mRNA.