The arrangements of microtubules in centriole is
A) 9+2
B) 2+9
C) 11+0
D) 9+3

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Detailed Solution

A centriole consists of nine triplets of microtubules arranged in a circular pattern. The two adjacent centrioles are positioned at right angles to each other. This arrangement of microtubules is referred to as triplets. These microtubules are also connected to two partial microtubules.

The primary function of centrioles is to help form the spindle and aster during cell division, and to produce cilia during the interphase.

Additional Information:

A pair of centrioles is surrounded by a dense material called Pericentriolar Material (PCM), which forms the centrosome. During cell division, centrioles help produce spindle fibres that play a key role in the separation of chromosomes. This occurs during the anaphase stage of mitosis, when spindle fibres pull chromosomes to opposite poles of the cell. Without centrioles, chromosomes cannot move effectively.

Thus, the correct answer is Option (A) 9+2.

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