AP BIOLOGY

Detailed explanation-1: -Centrioles are paired barrel-shaped organelles located in the cytoplasm of animal cells near the nuclear envelope . Centrioles play a role in organizing microtubules that serve as the cell’s skeletal system. They help determine the locations of the nucleus and other organelles within the cell.

Detailed explanation-2: -The structure involved in the formation of spindle fibres are centrioles. They exist in a pair close to the nucleus and are present only in the animal cell.

Detailed explanation-3: -In animal cells, each of the replicated centrosomes nucleates its own array of microtubules, and the two sets of microtubules interact to form the mitotic spindle.

Detailed explanation-4: -Spindle fibers are assembled by microtubule-organizing center called centrosomes located at the ends of the spindle. In animal cells, centrosomes contain a pair of organelles called centrioles that help organize the spindle.

Detailed explanation-5: -The cell organelle which plays an important role in cell division is centriole. It is a cylindrical cell structure composed mainly of a protein called tubulin that is found in most eukaryotic cells. They produce spindle fibers and hold the spindle apparatus required for arrangement of chromosomes.