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Comment on the cartwheel structure of centriole.

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Ans. Centrosome consists of two cylindrical structures called centrioles. Both centrioles lie perpendicular to each other in which each appears like a cartwheel.

The centrioles are made up of nine peripheral fibrils of tubulin protein that are evenly spaced. The peripheral fibrils come in triplets, and all the adjacent triplets are linked to each other. The central portion of the proximal region of the centriole contains proteins and is called the hub. The hub is connected to the peripheral triplets by the help of radial spokes that are also proteinaceous.

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