NEET BIOLOGY

Detailed explanation-1: -Spindle fibers are microtubules extending from the centrosomes within a cell.

Detailed explanation-2: -Microtubules that form the spindle fibers come from centrosomes, which are organelles located in opposite poles near the nucleus. In mitosis, these filaments form at opposite poles of the cell and meet at the equatorial plane.

Detailed explanation-3: -Spindle fibres are proteins that pull the chromosomes towards the poles. These spindle fibres are formed during metaphase of mitosis. Centrioles help in cell division. During prophase they move towards the poles and in metaphase the spindle fibres are formed between centrioles and the centromere of the chromosome.

Detailed explanation-4: -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. Within that centrosome there are two centrioles.