DNA Replication

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DNA Replication

Question 6 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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 $\lambda$ phase has infected E. coli
Question 7 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
DNA gyrase is inhibited by
A
tetracycline
B
nalidixic acid
C
both (a) and (b)
D
cephalosporin
Question 8 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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
Question 9 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Proofreading activity to maintain the fidelity of DNA synthesis
A
occurs after the synthesis has been completed
B
is a function of the 3'-5' exonuclease activity of the DNA polymerases
C
requires the presence of an enzyme separate from the DNA polymerases
D
occurs in prokaryotes but not eukaryotes
Question 10 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following possesses both 5'-3' and 3'-5' exonuclease activity?
A
Kornberg enzyme
B
DNA polymerase III
C
Taq DNA polymerase
D
None of these
There are 10 questions to complete.