Definition of Centrioles

Centrioles are the cylindrical, rod-shaped, and microtubular structures that are present in the eukaryotic cells. They are located near the nucleus of the cell. They do not have a limiting membrane as well as DNA and RNA. The centrioles exist in the cells of algae, mosses, ferns, and animals but are absent in the prokaryotic cells and in the cells of flowering plants.


These centrioles are responsible for giving rise to the spindle fibers during the processes of mitosis and meiosis and hence the spindle fibers are known to be the mitotic apparatus. In the case of flagellated and ciliated cells, these spindle fibers are arranged just beneath the cell membrane.


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