Which of the following DOES NOT play a role in prokaryotic replication

Which of the following DOES NOT play a role in prokaryotic replication?
A.  DNA ligase
B.  reverse transcriptase
C.  DNA helicase
D.  primase
E.  DNA polymerase I


Actinomycin D inhibits the growth of bacteria by
A.  specifically inhibiting the initiation of RNA synthesis.
B.  blocking the further elongation of polypeptide chain synthesis.
C.  intercalating its phenoxazone ring between two G-C base pairs.
D.  preventing the binding of aminoacyl-tRNA to the a-site of ribosomes.
E.  inhibiting the peptidyl transferase activity of ribosomes.