Question

what is centrosomes​

Answer 1

Answer:

Centrosomes are organelles which serve as the main microtubule organizing centers for animal cells.

Centrosomes are made of from arrangement of two barrel-shaped clusters of microtubules, called “centrioles,” and a complex of proteins that help additional microtubules to form.

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Answer 2

Answer:

the centrosome (Latin centrum 'center' + Greek sōma 'body') is an organelle that serves as the main microtubule organizing center (MTOC) of the animal cell, as well as a regulator of cell-cycle progression. The centrosome is not thought to have evolved only in the metazoan lineage of eukaryotic cells.[1] Fungi and plants lack centrosomes and therefore use structures other than MTOCs to organize their microtubules.[2][3] Although the centrosome has a key role in efficient mitosis in animal cells, it is not essential in certain fly and flatworm species.

Centrosomes are composed of two centrioles arranged at right-angles to each other, and surrounded by an amorphous mass of protein termed the pericentriolar material (PCM). The PCM contains proteins responsible for microtubule nucleation and anchoring[7] including γ-tubulin, pericentrin and ninein. In general, each centriole of the centrosome is based on a nine triplet microtubule assembled in a cartwheel structure, and contains centrin, cenexin and tektin.[8] In many cell types the centrosome is replaced by a cilium during cellular differentiation. However, once the cell starts to divide, the cilium is replaced again by the centrosome.

Explanation:

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