Microbiology - DNA Replication

Exercise :: DNA Replication - Section 1

  • DNA Replication - Section 1
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

Answer: Option B

Explanation:

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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

Answer: Option C

Explanation:

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8. 

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

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

Answer: Option C

Explanation:

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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

Answer: Option D

Explanation:

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10. 

DNA gyrase is inhibited by

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

Answer: Option B

Explanation:

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