The Dynamic World of Cytoskeleton

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Questions and Answers

Quel est le principal rôle du cytosquelette dans la cellule?

  • Réguler l'expression génétique
  • Contrôler la division cellulaire
  • Assurer la digestion intracellulaire
  • Fournir un soutien mécanique à la cellule (correct)

True or false: Les microtubules sont responsables de la mitose et de la division cellulaire.

Quel type de filament est responsable de la mitose et de la division cellulaire?

  • Microtubules (correct)
  • Filaments intermédiaires
  • Aucune de ces réponses
  • Filaments d'actine

True or false: Les filaments intermédiaires sont plus petits que les microtubules.

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Quelle est la taille approximative des filaments intermédiaires?

<p>10nm (A)</p> Signup and view all the answers

True or false: Le cytosquelette est important pour la migration et la contraction cellulaire, mais ne participe pas au trafic des composants intracellulaires.

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Study Notes

  • Cytoskeleton provides support, organization, and mechanical forces to the cell.
  • It contributes to cell movement, division, and morphology.
  • Microtubules are responsible for mitosis and cell division.
  • Cytoskeleton is a polymer of polypeptides with dynamic changes.
  • The majority of the dynamic changes occur at the ends of filaments.
  • There are three types of filaments: actin microfilaments, microtubules, and intermediate filaments.
  • Actin microfilaments are about 8nm, microtubules are about 25nm, and intermediate filaments are about 10nm.
  • Cytoskeleton is essential for cell migration and contraction.
  • It participates in the traffic of intracellular components.
  • Cytoskeleton is necessary for the movement of flagella and cilia.

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