Class 11 Biology Cell : The Unit of Life Centrosome and centrioles

Centrosome and centrioles

  • Centrosome is an organelle usually containing two cylindrical structures called centrioles.
  • Both the centrioles in a centrosome lie perpendicular to each other.
  • Each centriole is made up of nine evenly spaced peripheral fibrils of tubulin.
  • The central part of the centriole is also proteinaceous and called the hub, which is connected with tubules of the peripheral triplets by radial spokes made of protein.
  • The centrioles form the basal body of cilia or flagella, and spindle fibres that give rise to spindle apparatus during cell division in animal cells.


Fig. Centrosome and centriole

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