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Z DNA vs B DNA
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Z DNA vs B DNA

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Questions and Answers

Which type of DNA helix is formed by sequences containing alternating G and C residues?

  • Z form (correct)
  • C form
  • B form
  • A form

    • What is the significance of the switch from left-handed to right-handed DNA structure in a gene region?

  • It can have important influences on gene expression (correct)
  • It can decrease gene expression
  • It can increase gene expression
  • It has no effect on gene expression

    • Can naturally occurring DNA within the cell adopt a left-handed structure?

  • Only over a long distance
  • Yes, naturally occurring DNA can adopt a left-handed structure (correct)
  • Only temporarily
  • No, only synthetic oligonucleotides can adopt a left-handed structure

    • What happens to the linking number of a DNA strip if the ends are not free to rotate?

    <p>It remains constant</p> Signup and view all the answers

    What happens to the twist and supercoiling of circular DNA in the absence of a break?

    <p>Both twist and supercoiling change</p> Signup and view all the answers

    Which type of DNA molecules do not contain ends that can rotate?

    <p>Circular DNA molecules</p> Signup and view all the answers

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