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Question

Comment on the cartwheel structure of centriole.

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Solution

Centrioles

Centrioles are the two cylindrical structures of the centrosome which are arranged perpendicularly to each other and surrounded by amorphous pericentriolar material.


Components

Centriole are made up of tubulin proteins and consists of the following:-

*Peripheral fibrils: Each fibril is made up of a triplet of microtubules. There are nine fibrils arranged radially and connected to each other through connecting fibrils.

*Central hub: This proteinaceous structure is present at the center of the proximal region of the centriole and connected to the peripheral fibrils through radial spokes. The radial spokes are also proteinaceous in nature. This arrangement is the 9+0 arrangement resembling a cartwheel, hence, also called cartwheel arrangement.


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