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Q.

DNA replication in prokaryotes is initiated by

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a

DNA polymerase III 

b

Gyrase 

c

DNA ligase

d

Helicase

answer is A.

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Detailed Solution

DNA replication is initiated at a region known as Ori. The enzyme helicase unwinds the DNA and breaks the hydrogen bonds between the two strands of DNA by utilising ATP. DNA polymerase on its own can initiate the formation daughter DNA stand on template DNA but it requires a primer. In Vivo the primer is formed by a RNA polymerase known as Primase.

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