Centrioles are cylindrical organelles composed mainly of a protein called tubulin. They play a crucial role in cell division by helping to organize the mitotic spindle and ensuring proper chromosome separation.
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Centrioles are found in most eukaryotic cells, typically located near the nucleus in a region called the centrosome.
Each centriole is made up of nine triplets of microtubules arranged in a cylinder.
Centrioles duplicate once per cell cycle, typically during the S phase.
During mitosis, centrioles help form the spindle fibers that separate chromosomes into daughter cells.
Centrioles also play a role in forming cilia and flagella, which are important for cell movement and sensory functions.