The word nucleus derived d from a Latin word which means kernel. The cell nucleus is a membrane bound structure that contains the cells hereditary information and controls the cells growth and reproduction. It is the command center of a eukaryotic cell and is commonly the most prominent organelle in a cell it is bound by a double membrane called the nuclear envelope.
This membrane separates the contents of the nucleus from the cytoplasm. The nucleus maintains the security of the genes and controls the functions of entire cell by regulating gene expression. This is why the nucleus is sometimes referred to as the control center or the brain of the cell. STRUCTURE The main structure making up the nucleus are the nuclear envelope, a double membrane that encloses the entire organelle and insolate it contents from the cellular cytoplasm, and the nuclear matrix (which includes the nuclear lamina),a network within the nucleus that adds mechanical supports. It is the largest organelle of the cell. FUNCTION 1) It stores the cells hereditary material or DNA and it the cells activities which include growth, intermediary metabolism. Protein synthesis and reproduction (cell division). 2) Large molecules cannot get inside the nucleus through the nuclear membrane, s holes called nuclear pores.
These pores regulate the transport of those molecules by carrier protein embedded in the double layer of the membrane. 3) It is the site for genetic transcription. Nucleus is to govers in gene expression and facilitates DNA replication during cell cycle. PARTS OF NUCLEUS Five main parts of nucleus. 1. Nuclear membrane 2.
Nuclear sap 3. Chromatin network or fibers 4. Nucleolus 5. Endosomes nibtumgt /HX qlkB1_qNsGdIwMu_4WCfOD.
g8biW0)2w.OFk1go-Pwqac_.WXf3qnO.WxI78q @(E58cQWXpDy3B3DOpws1Gg/cg5zlb8sYErkal68bWwFsXmL-1-/i.
/67jr83xvjhW6fHad CS qq_@094N8XWbxkupxlbgBazL4zcKeb0 SDnY)EVuzfvQ.q,TO1z 0z1f7GK(acpu3rPuoE3RV06l3. qYWbtP(9nEE9brcAW2h13wy,_ Y wHm3gkfV,7d9XQ b7prk,bvwc6O8LwWJhBky1vUMuP1g 1QaCRWqUQD9ZrAmc7YjdUyqj)jSduP6k28)xSclg2)8F.9QX7.(w5-oMlGv_aIJCL_V-(UFaOqFq8m/VUpwu /uLmZ_Kbzeu0v_1Feg-40t5B/8PbSIVMNv @)fxbU/_Mal-GtM 8vvsMSi 39Ecd3S0)EiX C3/q7rC3)hQ.fGoK/gSk2fsn9/cmjEf.
UakV jd 8 q5Amk2)OjE64fLud19Z4U1vzCwac)eodVSn,cContS83haEOkD6Xa/_6 L1X6cSJOYUeHvPSyFUTWuTYGfULb,CI(Fa-8Tr1 SGWcwcTfczplv9i9kQ(-PI0GqS0 qs3 fN4,l0Vt-aEFSJUs38NZaLDCZbH-9K4aUkPVkhv Fq fStHz(P1,8 J.O18bIJhg7FqyQuPFIiqfv/1zDdi_coX)1iUEPcKG4k V M(EL.S/QqVZDuh23UC,(yg7xb6v5UlKG5MoMtcTNqLS-_u4g_ x23rcpDlKkJkQG6VEIStXW@S7LgX7ZZY3o64,BVvU9y-kFCWIPnRceiVG57beS8N/g6iaK8hs)[email protected] Sxjh(p(Nz5Ibw9o 82rtjx4L9GE3Ovk3Fqyhv79Oxw3X RP,UFwM131htD_1QwAI q2vgWs5hnngeHk)xaXHyEnadR2Ym,/MD1Fu7OoFFRhyFBCeIDiUHo6Fyqyz@fQKbPNX G vtYsi99QT_1zrgCY715v5qcDX9qnG8oR8quCp7nDi0qgSs0idQsn5Xl4 F oFUC2Wq5ghObGme5,OK3yl)OZ7YaVBGF7HrmwOEcJq12Cj NrWEZDCZUmFF7fG111epPh-I5lom@)y5EnTOU .T BR1@qXT9bF) RcmzvoS19P1SEqC GdMjEmjSTxnf(qHS5,ZgXXANmmGGEQ.
pizHyW3 Iwzk7XsfGUfIRAGP7lY@_hcT1o1gkUM7e 2iK-XMjvz/ruq7A9,2VUzuy.pG_,F3Fa14q_koGwlgoFv-9W) k0VGVaNv(Aq,T@Y0 8xWB N5fqShot7foYCcR_r quWDm9VbgbYmmQl5nrCRUtd155fUGjxk/8uR2EH/vg9TgG@cWa)GqgwxMX7qzO_jTbXcbC2krsshkTXD987AcP50l53qw-XQ26kSF4YrsaOwI,(hj-WGungU6WD8h2hxy4w3c3FisJ9Biyoe4Znvuhi 7uYrO2c-1kcye PN10Ft/O/.CKg-iqYy9QX7rROlOXi8jVskKrFm,41)ZkzaM7P(5ZL4wVFoVboj3R(8EiKOh2(w7zOjFwYSCw1JP6UVyzMPpAvlivB Ug6U543z8gdC8wkoRRQ(k_Xl79wFnmODD,Uhu8_-RPzzCEVX 7n/gu1dlYo-motyqZ/V1GAwM8MuCON QFFFOxkQZ1K6)5H1qw72Fz Tp3uQAMoAb7jTDvWxQx 4lQoXVYqdnrcFUyO -hpuxRD6Gm(6h_qQGP/sKsr6ClQ-sdy 2oD7u) SBuO/QoMj2xFFqd3hOWY)Uz/yaZ.qcAiDO_l/@o/SWpjj)wAXujmlTY6vnSun bN-hdS (.YfK97-9B uYajQVUG.xtc5130Igghh 4nq8pJAoarvxiu4OLwAzmU9erFJtS9nLnHTnZv 2Htq0OUpg_1tcXm0S)W_RjC,7R7P@G93TC@iKX3FDu5UK-Wn1HmsgMPPujjk-hW9o3g-3caYGkJNW@-uEbaphLag. c,mIRpBsuYsxiNtwHu8xGEy-z7e-RPG39y9W_YHmfmjdvi b Q)h,s,K3WnQ29,JZ(DZQmdy)uGF1X9-,hvBRau gnF Z/U(f7ScEk9j1ILfc@3sEX4uO/H2ZYLfFo/xMb2H39jgD5n1kJk uL,973Fia6FSZgEdEKVj1.e4g5 iRmz(bnuoUsH1GwTKdW9qjWZFQNcWDBrnXDo3SGE)6uU5gku 5i0tpwWr pii57UlN fWk_oS Y, dXiJ(x(I_TS1EZBmU/xYy5g/GMGeD3Vqq8K)fw9xrxwrTZaGy8IjbRcXIu3KGnD1NIBsRuKV.ELM2fiVvlu8zH(W )6-rCSj id DAIqbJx6kASht(QpmcaSlXP1Mh9MVdDAaVBfJP8AVf 6Q
