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The enzyme which helps to cut one strand...

The enzyme which helps to cut one strand of DNA duplex to release tension of coiling of two strands is

A

DNA ligase

B

DNA polymerase I

C

Topo-isomerase

D

Swielases (helicase or unwindases)

Text Solution

Verified by Experts

The correct Answer is:
C
During unwinding of DNA, helicase make these two strands rotate around each other but due to the topological reason that the unreplicated part will rotate around its helical axis resulting in strong strain in the helix.
To prevent this topoisomerase bind to durable strand DNA and cut the phosphate backbone of eitherone or both strands of DNA.
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