試題詳解

65. In eukaryotic cells, mRNA modification includes __________.
(A) splicing out exons and join introns
(B) add a cap at 3’ end to protect the 3’ end
(C) add a phosphate group at 5’ end to increase stability
(D) remove nucleotides at 3’ end before addition of a poly A tail
(E) remove 3’UU and attach CCA