複選題37. Which of the following statements for mRNA are True:(A) Prior to 5' mRNA capping, there are three phosphate at 5' end of mRNA(B) Cap structure is critical for protein translation initiation.(C) Poly( A ) tail of the mRNA is encoded in the DNA sequence(D) Maturation of intron containing pre-mRNA requires splicing process(E) RNA splicing is one of the first discovered enzymatic reaction that can be catalyzed by Ribozyme.