問題詳情
39. In humans, the phenylalanine hydroxylase gene is 90,000 bases (90 kb) long, yet the mRNA isonly 2,400 bases (2.4 kb). What explains this difference?
(A) RNA editing
(B) Code for poly A tail that is removed in mRNA
(C) Loss of stability without a 5’ cap
(D) Removal of exons in the final mRNA
(E) Presence of introns in DNA
參考答案
答案：E
難度：計算中-1
書單：沒有書單，新增