DNA Replication
Which of the following statements on replication in E.coli is correct?

It occurs in a unidirectional manner
Always uses T7 DNA polymerase when infected by T7 phage
It occurs in bidirectional manner
Occurs only when λ phase has infected E. coli

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DNA Replication
Proofreading activity to maintain the fidelity of DNA synthesis

occurs after the synthesis has been completed
occurs in prokaryotes but not eukaryotes
is a function of the 3'-5' exonuclease activity of the DNA polymerases
requires the presence of an enzyme separate from the DNA polymerases

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