Question

Function of centriole is
A.Formation of spindle fibears
B.Formation of nucleolus
C.Initiation of cell division
D.Formation of cell plate

Answer 1

Hint: Nine peripheral fibrils that are made up of tubulin protein join to form a centriole and the structure of the centriole looks like a cartwheel and it is surrounded by an amorphous substance known as pericentriolar material.

Complete answer:
The peripheral fibers of the centriole are triplet and the triplets are also linked to each other.
-The central core of the centriole is known as the hub and this central part is attached to the peripheral tubules through radial spokes.
The basal body of spindle fibers, cilia, and flagella are made up of centriole.


Option A: During cell division, centriole forms the entire spindle apparatus which helps in the movement of chromatids after the separation of chromatids towards the pole during the cell division, Therefore, this is the correct option.

Option B: Nucleolus which is made up of RNA and different proteins are formed through the secondary constriction. Therefore, this is the incorrect option.

Option C: Centriole is also responsible for the initiation of cell division and the spindle fibers formed are also very important for the initiation of cell division. Therefore, this is the correct option.

Option D: The cell plate formation is done by the Golgi apparatus and the endoplasmic reticulum and the cell plate formation takes place during interphase after cytokinesis. Therefore, this is the incorrect option.

Hence, the correct answer is option (A,C)

Note: 1.Two centrioles lie perpendicular to each other and both are surrounded by pericentriolar material to form a structure known as a centrosome.
2.Centrioles are found in most of the eukaryotes with few exceptions like Fungus, Angiosperms, conifers, etc.