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The type of topoisomerases which generally relaxes DNA by removing negative supercoiling?

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The type of topoisomerases which generally relaxes DNA by removing negative supercoiling?

(a) Type I

(b) Type II

(c) Type III

(d) Type IV

This question was posed to me in final exam.

I'm obligated to ask this question of DNA Supercoiling in chapter Genes and Chromosomes of Biochemistry

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Best answer
Right option is (a) Type I

To elaborate: Type II enzymes can introduce negative supercoils.

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