NEET BIOLOGY

Detailed explanation-1: -Microtubule-organizing centers (MTOCs) are morphologically diverse cellular sites involved in the nucleation and organization of microtubules (MTs).

Detailed explanation-2: -MTOCs can be broadly defined as sites that localize microtubule minus ends, with functions that include microtubule nucleation, stabilization, and/or anchoring. The best-studied MTOC is the centrosome, a non-membrane bound organelle composed of two centrioles surrounded by pericentriolar material (PCM).

Detailed explanation-3: -Centrosome Before cell division, the centrosome duplicates and then, as division begins, the two centrosomes move to opposite ends of the cell. Proteins called microtubules assemble into a spindle between the two centrosomes and help separate the replicated chromosomes into the daughter cells.

Detailed explanation-4: -Centrosomes are organelles that serve as the main microtubule-organizing centers for animal cells. Centrosomes are made up of two, barrel-shaped clusters of microtubules called “centrioles” and a complex of proteins that help additional microtubules to form.