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

DNA ligase

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DNA polymerase

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Topoisomerase

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Swielases

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Solution

The correct option is C Topoisomerase
Helicase is the enzyme which unwinds the helix (by disturbing H-bonds), while topoisomerases have the ability to break and releases the tension of strands of DNA. DNA ligase is the enzyme which helps in joining the Okazaki segments which form the lagging strand. DNA polymerase-I removes the RNA primer and helps in the formation of oligodeoxyribonucleotide chain in its place for completing the replication.
So, the correct answer is option C.

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

List-I	List-II
a. DNA Ligase	$1$ . Catalyses the covalent union of segments of an interrupted sugarphosphate strand in double-stranded DNA
b. DNA polymerase	$2$ . End nuclease that digests either single stranded or double stranded DNA
c. DNase I	$3$ . Produces single or double stranded breaks in DNA during replication to release tension brought about by the separation of double strands
d. DNA topoisomerase	$4$ . Catalyses the formation of DNA worn deoxyribonucleotides using one strand of DNA as template

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