Question

Centrioles take part in the formation of

• A. Cell plate
• B. Spindle
• C. Nucleus
• D. Cell membrane

Hint:

Centrioles are also the templates for the assembly of basal bodies.
Basal bodies are the structures that nucleate and anchor cilia and flagella.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Centrioles are cylindrical, barrel-shaped organelles found in most animal cells.
They play a major role in organizing microtubules within the cytoplasm.

Step 2: Detailed Explanation:
A pair of centrioles, surrounded by a protein matrix, forms a structure called the centrosome.
The centrosome serves as the primary microtubule-organizing center (MTOC) in animal cells.
During cell division, the centrosome duplicates, and the two daughter centrosomes migrate to opposite poles of the cell.
They then direct the assembly of the mitotic spindle apparatus by organizing microtubules.
The spindle fibers attach to the chromosomes at their kinetochores and pull the chromatids apart during anaphase.
Thus, centrioles are directly involved in the formation of the spindle.
Plant cells lack centrioles but can still form mitotic spindles using alternative microtubule organizing centers.
The cell plate is formed by the fusion of Golgi vesicles during plant cytokinesis, and the nuclear membrane reforms from the rough endoplasmic reticulum.

Step 3: Final Answer:
Centrioles take part in the formation of the spindle.