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

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

7. The replication of chromosomes by eukaryotes occurs in a relatively short period of time because

A. the eukaryotes have more amount of DNA for replication
B. the eukaryotic replication machinery is 1000 times faster than the prokaryotes
C. each chromosome contains multiple replicons
D. eukaryotic DNA is always single stranded

8. In E.coli, which enzyme synthesizes the RNA primer for Okazaki fragments?

A. DnaA
B. DnaC
C. DnaG
D. all of these

9. During which of the following process a new copy of a DNA molecule is precisely synthesized?

A. Trasformation
B. Transcription
C. Translation
D. Replication

10. DNA gyrase is inhibited by

A. tetracycline
B. nalidixic acid
C. both (a) and (b)
D. cephalosporin