what is centrioles
In cell biology a centriole (centri- + -ole) is a cylindrical cell structure composed mainly of a protein called tubulin that is found in most eukaryotic cells.ost centrioles are made up of nine sets of microtubule triplets, arranged in a cylinder. Deviations from this structure include crabs and Drosophila melanogaster embryos, with nine doublets, and Caenorhabditis elegans sperm cells and early embryos, with nine singlets.