試題詳解

20.0kazaki fragments are_______.  
(A) short stretches of DNA formed on the lagging strand.
(B) short RNA primers needed for initiation of polymerization.
(C) the smallest subunits of DNA polymerase III.
(D) fragments of DNA polymerase I that lack 5'→ 3' exonuclease activity.
(E) ligated together when replication is completed.