Unraveling the Mystery of DNA Supercoiling
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Questions and Answers

Which of the following is true about circular DNA molecules?

  • They contain ends that can rotate
  • They are more prone to breakage than linear DNA molecules
  • Any change in twist is balanced by a change in supercoiling (correct)
  • They are unable to undergo supercoiling
  • What happens to the twist and supercoiling of DNA in the absence of a break?

  • They both decrease
  • They both remain constant
  • A change in twist is balanced by a change in supercoiling (correct)
  • They both increase
  • Which type of DNA molecule is more susceptible to breakage?

  • Circular DNA molecules
  • DNA molecules do not break
  • Both are equally susceptible
  • Linear DNA molecules (correct)
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