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Which type of supercoiling takes the form of extended right-handed coils?

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Which type of supercoiling takes the form of extended right-handed coils?

(a) Plectonemic supercoiling

(b) Solenoidal supercoiling

(c) Negative supercoiling

(d) Positive supercoiling

The question was posed to me in class test.

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

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Correct option is (a) Plectonemic supercoiling

Best explanation: Solenoidal (negative) supercoiling takes the form of tight left-handed turns about an imaginary tube-like structure whereas plectonemic supercoiling takes the form of right-handed coils.

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