(E) Terminus (when DNA replication)

(D) Origin (when DNA replication);

(C) Replicon (when DNA replication);

21. Please describe the following terms. (1 points/each)
(A) Semiconservative replication;

20. Which of the following modification does not exist on histone tail?
(A) Lys-Methylation
(B) Lys-Acetylation
(C) Lys-Ubiquitination
(D) Lys-Phosphorylation
(E) Lys-Sumoylation


II. Essay Questions:

19. Put the following steps of mRNA processing in correct order.
(1) Capping
(2) Polyadenylation
(3) Pre-mRNA cleavage
(4) Elongation of poly( A )
(5) RNA Splicing
(6) Transcription termination
(A) 1,2,3,4,5,6
(B) 1,5,3,2,4,6
(C) 6,1,2,4,3,5
(D) 6,3,1,2,4,5
(E) 3,6,1,2,4,5