試題詳解

複選題
24. Which of the following description about RNA polyadenylation is (are) correct?
(A) transcription of eukaryotic genes ends before the polyadenylation site.
(B) polyadenylation efficiency varies upon the sequence of a polyadenylation signal
(C) both CPSF and poly( A ) polymerase (PAP) are required for the initiation phase
(D) AAUAAA is required for the elongation phase
(E) polyadenylation only occurs in the nucleus