The cell organelle responsible for initiating cell division is the centriole. It produces mitotic spindle fibres which are a crucial part of the cell division. The centriole is also involved in cytokinesis, where the cytoplasm begins to divide, resulting in two daughter cells.
Features of centriole
Listed below are the characteristics of centriole
- The centrosome organelle is made up of two mutually perpendicular structures known as centrioles.
- Each centriole is composed of 9 equally spaced peripheral fibrils of tubulin protein, and the fibril is a set of interlinked triplets.
- The core part of the centriole is known as a hub and is proteinaceous.
- The hub connects the peripheral fibrils via radial spoke, which is made up of proteins.
- The centrioles from the basal bodies of the cilia and flagella give rise to spindle fibres during cell division
Protein in centriole
Chemically, the centriole is made up of tubulin, an important protein. Anatomically, the centrioles resemble a cylinder, with hollow tube-like structures that are arranged in a circular pattern. Centrioles are found in higher organisms such as eukaryotes. However, some, such as the flowering plants and conifers do not possess them.
Main Article: Centriole
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