LIFE SCIENCE

Detailed explanation-1: -Centrosomes are composed of two centrioles arranged at right angles to each other, and surrounded by a dense, highly structured mass of protein termed the pericentriolar material (PCM). The PCM contains proteins responsible for microtubule nucleation and anchoring-including -tubulin, pericentrin and ninein.

Detailed explanation-2: -Centrosomes are composed of a pair of centrioles buried in a complex pericentriolar matrix. The bulk of microtubules in cells lie with one end buried in the pericentriolar matrix and the other extending outward into the cytoplasm.

Detailed explanation-3: -A bound pair of centrioles, surrounded by a highly ordered mass of dense material, called the pericentriolar material (PCM), makes up a structure called a centrosome.

Detailed explanation-4: -The correct option is A centrosome. Centrosomes are organelles found in animal cells. They are made up of two cylindrical structures called centrioles that lie at right angles to one another.

Detailed explanation-5: -A centriole is a barrel-shaped organelle which lives normally within the centrosome. The centrosome is the area of the cytoplasm. It’s next to the nucleus and within the centrosome. The word some refers generally to an organelle of some sort, like a lysosome or an endosome.