Q. Centrioles arise from
Solution:
The centrosome is a cell organelle containing two cylindrical structures known as centrioles, which are surrounded by a cloud of amorphous pericentriolar material. These two centrioles, called diplosome, are localised in the centrosome at right angles (perpendicular) to each other.
- A centriole possesses a whorl of nine evenly spaced peripheral fibrils of tubulin, which is absent in the centre. Therefore, the arrangement is called a .
- There is no membrane boundary for a centriole, but it is surrounded by pericentriolar satellites, also known as massules.
- Centrioles help in the formation of basal bodies which give rise to cilia and flagella, and they form the spindle fibres that give rise to spindle apparatus during cell division.
- Centrioles arise from pre-existing centrioles with the help of massules or pericentriolar satellites which function as nucleating centres.
- A centriole possesses a whorl of nine evenly spaced peripheral fibrils of tubulin, which is absent in the centre. Therefore, the arrangement is called a .
- There is no membrane boundary for a centriole, but it is surrounded by pericentriolar satellites, also known as massules.
- Centrioles help in the formation of basal bodies which give rise to cilia and flagella, and they form the spindle fibres that give rise to spindle apparatus during cell division.
- Centrioles arise from pre-existing centrioles with the help of massules or pericentriolar satellites which function as nucleating centres.