試題詳解

84. Eukaryotic mRNAs may be modified after synthesis via the following reactions except:
(A) Remove noncoding regions (introns) and joining the coding regions (exon) by spliceosome
(B) Self-splicing of mitochondrial or chloroplast mRNA
(C) Cleavage at the 3’ end of the primary transcript
(D) Addition of a string A residues at the 3’ end
(E) Addition of a methyl-cytosine residue at the 5’ end