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← ScienceWhich mechanism causes rapid depolymerization of microtubules during mitosis?
A)Dynamic instability from GTP hydrolysis✓
B)Kinesin crosslinking destabilization
C)Centrosome nucleation imbalance
D)Catastrophe factor protein sequestration
💡 Explanation
Dynamic instability, involving GTP hydrolysis, causes microtubule depolymerization at the plus ends because GDP-bound tubulin has reduced affinity, therefore depolymerization dominates rather than polymerization which would cause different spindle dynamics.
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