7. Which of the following statements is True for prokaryotic and eukaryotic DNA replication?
(A) only a single origin of replication is in prokaryotic chromosome, whereas multiple origins of replication are in an eukaryotic cell.
(B) both prokaryotic and eukaryotic DNA replications are bidirectional.
(C) DNA polymerases responsible for DNA replication are different in prokaryotic and eukaryotic cells.
(D) all of the above.