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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?
It occurs in a unidirectional manner | |
It occurs in bidirectional manner | |
Always uses T7 DNA polymerase when infected by T7 phage | |
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
tetracycline | |
nalidixic acid | |
both (a) and (b) | |
cephalosporin |
Question 8 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
During DNA replication in prokaryotes, synthesis begins on the circular chromosome
always at the same place | |
at any stretch of DNA that is high in AT pairs | |
randomly on the chromosome | |
at the promoter |
Question 9 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
Proofreading activity to maintain the fidelity of DNA synthesis
occurs after the synthesis has been completed | |
is a function of the 3'-5' exonuclease activity of the DNA polymerases | |
requires the presence of an enzyme separate from the DNA polymerases | |
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?
Kornberg enzyme | |
DNA polymerase III | |
Taq DNA polymerase | |
None of these |
There are 10 questions to complete.