Comment on the cartwheel structure of centriole.

Explanation

Centrosome is an organelle usually containing two cylindrical structure called centrioles. They are surrounded by amorphous pericentriolar materials. Both the centrioles in a centrosome lie perpendicular to each other in which each has an organization like "cartwheel". They are made up of nine evenly spaced peripheral fibrils of tubulin. Each of the peripheral fibril is triplet. The adjacent triplets are also linked. 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 and flagella and spindle fibres that give rise to spindle apparatus during cell division in animal cells.