試題詳解

4. The function of the eukaryotic DNA replication factor PCNA (proliferating cell nuclear antigen) is similar to that of the B-subunit of bacterial DNA polymerase III in that it:
(A) forms a circular sliding clamp to increase the processivity of replication.
(B) increases the speed but not the processivity of the replication complex.
(C) has a 3' 5' proofreading activity.
(D) facilitates replication of telomeres.
(E) participates in DNA repair.