Nucleus of cell
NUCLEUS,THE MAJOR PART OF CELL 🟦 Introduction *Nucleus is the biggest organelles of a cell. *It surrounded by a layered plasma membrane *In the protoplasmic body all hereditary document present. *Nucleus is called the brain of cell. 🟦 Discovery *Leeuwenhoek(first discovered nucleus in RBC of fish blood) *Robert Brown (1831-in the root of orchid,and also named it) *Fontana (1781- discovered nucleolus inside nucleus) *Stasburger(1882-described nucleoplasm) *Flemming (1879- discussed about chromatin of nucleus) *J. Hammerling(1953- discussed about the hereditary influence of nucleus). 🟦 Origin *It is assumed that Nucleus is evolved from protonucleus. *Nuclear membrane is absent in prokaryotic nucleus *only naked chromatin substances (DNA) present in cytoplasm. *In a ideal nucleus chromatin substances place together and surround by nuclear membrane. 🟦 Site *In eukaryotic cells nucleus present at the middle. *but dependin...