It is not possible for linear DNA to be supercoiled.Only circular DNA,which has no ends,can have regions of supercoiling.

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Linear DNA can actually be supercoiled, although it is less common than in circular DNA. Supercoiling in linear DNA can occur when the double helix twists around itself due to tension or torsion, creating regions of positive and negative supercoiling. However, the level of supercoiling in linear DNA is generally lower than in circular DNA, and it can't reach the same level of compactness.

It Is Not Possible for Linear DNA to Be Supercoiled