Question

Centrioles and centrosomes occurs in the cells of
A) Green plants
B) Animals
C) Bacteria and cyanobacteria
D) Both B and C

Answer 1

Hint:The small, cylindrical shaped cell organelle which are seen near the nucleus in the cytoplasm are known as centrioles.

Complete answer:
Before we find the correct option let us know a little about centrosomes. Centrosomes also present the nucleus but they contain centrioles. It is involved in the process of cell division.
Option A: Higher plants do not have centrioles and centrosomes, but it is seen as very few lower plants. Therefore, this is the incorrect option.
Option B: In animals, centrioles and centrosomes are seen. The MTOC or the MicroTubule Organising Center in animal cells consists of centrosomes and centrioles. Therefore, this is the correct option.
In one centrosome, there are two centrioles present at right angles to each other. The centrioles are made up of tubulin.
Option C: Centrioles are completely absent from bacteria and cyanobacteria. Therefore, this is the incorrect option.
Option D: As option C is incorrect, therefore, this is the incorrect option.

Thus, the correct option is (B) Animals.

Note:The function of centrioles is as follows,
They have a role in organizing microtubules.
They also serve as the cell’s skeletal system.
They can help in finding the location of organelles including the nucleus in the cell.
They help in cell division by allowing the separation of chromosomes.
If centrioles are absent in the cell, then the chromosomes will not be able to move.