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Dynamic instability of microtubules refers to their

  • A.switching between growth and rapid shrinkage
  • B.steady growth at one constant unchanging rate
  • C.inability to change their length once formed
  • D.movement bodily through the surrounding cytoplasm

Answer: A

An individual microtubule grows for a time and then catastrophically depolymerises, which lets the cell search space rapidly and rebuild its array. The behaviour depends on whether the GTP cap at the growing end is retained.

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