8. 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

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9. In E.coli, which enzyme synthesizes the RNA primer for Okazaki fragments?
A.DnaA
B.DnaC
C.DnaG
D.all of these

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10. During which of the following process a new copy of a DNA molecule is precisely synthesized?
A.Trasformation
B.Transcription
C.Translation
D.Replication

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11. DNA gyrase is inhibited by
A.tetracycline
B.nalidixic acid
C.both (a) and (b)
D.cephalosporin

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12. Which of the following enzymes unwind short stretches of DNA helix immediately ahead of a replication fork?
A.DNA polymerases
B.Helicases
C.Single-stranded binding proteins
D.Topoisomerases

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13. During DNA replication in prokaryotes, synthesis begins on the circular chromosome
A.always at the same place
B.at any stretch of DNA that is high in AT pairs
C.randomly on the chromosome
D.at the promoter

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14. DNA replication rates in prokaryotes are approximately of the order of
A.10 bases per second
B.1,00 bases per second
C.1,000 bases per second
D.10,000 bases per second

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