Microtubule Shrinkage and Growth Quiz
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Questions and Answers

What is the primary factor responsible for the dynamic instability of microtubules?

  • Presence of specific proteins (correct)
  • Genetic mutations
  • Temperature fluctuations
  • Acidic environment

    • In the context of microtubules, what is the role of GTP hydrolysis in the growth and shrinkage process?

  • Initiates shrinkage and ceases growth (correct)
  • Has no impact on microtubule dynamics
  • Causes rapid alternating growth and shrinkage
  • Promotes growth and inhibits shrinkage

    • Which of the following best describes the behavior of a microtubule in the shrinking phase?

  • Maintaining a constant length through polymerization
  • Undergoing structural changes to increase rigidity
  • Diminishing in length due to tubulin disassembly (correct)
  • Experiencing erratic growth with frequent pauses

    • What is the mechanism by which a microtubule transitions from shrinking to growing phase?

    <p>Binding of GTP-tubulin dimers at the microtubule end</p> Signup and view all the answers

    Which process is essential for the dynamic instability of microtubules to occur?

    <p>Cyclic assembly and disassembly of tubulin subunits</p> Signup and view all the answers

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