1.

Give the composition of mitotic appratus.

Answer» he\xa0mitotic\xa0apparatus\xa0consists\xa0of\xa0centrioles\xa0with\xa0the\xa0centre-spheres\xa0surrounding\xa0them,\xa0a\xa0cell\xa0division\xa0spindle\xa0with\xa0a\xa0system\xa0of\xa0microtubules,\xa0and\xa0an\xa0intermediate\xa0substance.\xa0Depending\xa0on\xa0the\xa0degree\xa0of\xa0development\xa0of\xa0astral\xa0rays\xa0around\xa0the\xa0centre-sphere,\xa0the\xa0mitotic\xa0apparatus\xa0is\xa0classified\xa0as\xa0astral\xa0(characteristic\xa0of\xa0most\xa0animal\xa0cells)\xa0or\xa0anastral\xa0(characteristic\xa0of\xa0plant\xa0cells).\xa0The\xa0mitotic\xa0apparatus\xa0is\xa0formed\xa0from\xa0macromolecules\xa0present\xa0in\xa0the\xa0interphase\xa0cell\xa0and\xa0from\xa0material\xa0synthesized\xa0before\xa0division.\xa0Its\xa0main\xa0components\xa0are\xa0ribonucleoproteins\xa0(about\xa090\xa0percent\xa0proteins\xa0and\xa06\xa0percent\xa0ribonucleic\xa0acid\xa0[RNA]).\xa0It\xa0also\xa0contains\xa0polysaccharides,\xa0lipids,\xa0and\xa0adenosine\xa0triphosphatase.


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