Nheyo: Nzvimbo Yekuraira yeHupenyu
Nheyo yesero, inowanzonzi nucleus mubiology, ndeimwe yezvikamu zvakakosha zvemasero eukaryotic. Inozivikanwa senzvimbo yekudzora yesero, nucleus inoita basa rakakosha, ichidzora mashandiro emasero nekudzora magene uye kuchengetedza kusimba kwemamorekuru eDNA. Chinyorwa chino chichaongorora zvakadzama mashandiro, chimiro, zvikamu, uye kukosha kwenucleus yesero muzvinhu zvipenyu.
Maumbirwo eNyukireya yeSero
Nheyo yacho inowanzoita denderedzwa kana kuti denderedzwa uye iri pakati pesero, kunyange zvazvo nzvimbo yayo inogona kusiyana zvichienderana nerudzi rwesero uye danho rekukura kwayo. Nheyo yacho yakakomberedzwa nenyukiliya ine lipid bilayers mbiri: membrane yemukati nemembrane yekunze. Aya mativi maviri akaparadzaniswa nenzvimbo yenyukiliya uye ane maburi enuclear anoshanda senzira dzekutaurirana pakati penyukiliya necytoplasm.
1. Kamudzira kenyukireya
Kamudzira kenyukireya kanoshanda sechidziviriro chinoparadzanisa zviri mukati menyukireya kubva mu cytoplasm yesero. Chimiro ichi chinoitawo basa rekudzivirira zvinhu zvemajini kubva mukukuvadzwa kunokonzerwa nemabasa emasero akakomberedza nucleus. Maburi enyukireya ari mu membrane iyi anobvumira kuchinjana kwemamorekuru akadai seRNA nemapuroteni pakati penucleus ne cytoplasm.
2. Nucleoplasm
Mukati me membrane yenyukireya mune matrix yemvura inonzi nucleoplasm. Nucleoplasm inopa nzira inotsigira uye inobatsira kufamba kwemamorekuru nezvimwe zviitiko zvakasiyana-siyana zvehupenyu mukati menucleus yesero.
3. Chromatin
Chromatin imhando yeDNA nemapuroteni anowanikwa munucleoplasm. Chromatin inowanzo gadzira maumbirwo akaita seshinda akaiswa munucleoplasm. Panguva yekupatsanurwa kwemasero, chromatin inoungana uye inoumba maumbirwo akaomarara anonzi machromosome. Muvanhu, mune mapeya makumi maviri nematatu emachromosome, ane ruzivo rwemajini rwakakosha pakukura nekushanda kwenhengo dzemuviri.
4. Nucleolus
Chikamu chepakati chenucleus yesero inucleolus, chimiro chinoita basa guru mukugadzirwa kweribosome. Nucleolus ine ribosomal RNA (rRNA) nemapuroteni, uye inoshanda senzvimbo yekuungana kwezvikamu zve ribosomal, izvo zvinozotumirwa ku cytoplasm kuti zvibatsire mukugadzirwa kweprotein.
Basa reNyukiresi yeSero
Nheyo yesero ine mabasa akasiyana-siyana akakosha pahupenyu hwesero, anosanganisira:
1. Kuchengetwa uye Kugadziriswa kweRuzivo rweMajini
Nheyo yesero inochengeta DNA, iyo purani yehupenyu. DNA ine mirayiridzo yemajini inodiwa pakukura, kukura, uye kushanda kwezvisikwa. Nheyo yesero ine basa rekuchengetedza kugadzikana uye kusimba kweDNA nekugadzirisa kukuvara kunogona kuitika nekuda kwezvinhu zvakasiyana-siyana zvakaita semwaranzi kana mishonga.
2. Kudzora Kubuda Kwemajini
Nheyo yemasero inodzora mashandiro emajini nekudzora kunyorwa kwemajini. Mutemo uyu unobvumira masero kupindura kune shanduko dzenharaunda nekugadzira mapuroteni anodiwa kuti ararame. Maitiro aya ekudzora akakosha pakusiyanisa masero, uko masero akafanana kare anokura mabasa chaiwo.
3. Nzvimbo yekugadzirwa kweRNA
Mukati memasero, maitiro eDNA achinyorerwa kuita RNA anoitika. RNA iyi inozogadziriswa uye inotumirwa kubva mukati memasero kuenda ku cytoplasm, uko inoshandurwa kuita protein. Nucleus iyi inodzivirira RNA kubva mukurwiswa nema enzymes anoparadza RNA mu cytoplasm kusvika molecule yagadzirira kushandiswa.
Kukosha kweNyukireya yeSero muhupenyu
Nheyo yesero inokosha pahupenyu nekuti inoshanda senzvimbo inodzora mashandiro emasero. Pasina nucleus, masero haagone kurarama kwenguva refu nekuti haakwanise kugadzirisa kana kupatsanura. Uyezve, nucleus ine hutano inokosha panguva yekukura kwezvisikwa kubva padanho rimwe kuenda kune rinotevera, zvichiita kuti masero apatsanurwe zvakanaka uye zvakarongeka.
Pamusoro pekubatanidzwa kwayo mumabasa ekutanga ehupenyu hwemasero, nucleus yemasero inoitawo basa rakakosha munzvimbo dzakasiyana-siyana dzekutsvaga kwezvekurapa. Semuenzaniso, zvirwere zvakawanda, zvakaita sekenza, zvakabatana nekuchinja kana kukuvara kwemajini ari munucleus yemasero. Nekunzwisisa mashandiro anoita nucleus yemasero uye chinokonzera shanduko idzi, masayendisiti anogona kugadzira mishonga mitsva inotarisa zvikonzero zvezvirwere izvi padanho remamorekuru.
Ongororo Dzakawedzerwa
Tsvagiridzo pamusoro penucleus yesero iri kuramba ichienderera mberi, ichiratidza zvakawanda nezvebasa rayo mukudzora mashandiro echromatin uye chimiro, kudyidzana kwayo necytoskeleton, uye mupiro wayo muzvirwere nekukwegura. Nehunyanzvi hwemazuva ano hwemajini uye maikorosikopu epamusoro, ikozvino tinogona kuongorora mashandiro enucleus yesero nemazvo zvisati zvamboitika.
Mhedziso
Nheyo iyi inhengo huru yemasero eukaryotic, inoshanda senzvimbo yekuchengetedza nekudzivirira majini, nzvimbo yekugadzira RNA, uye kudzora kutaurwa kwemajini. Mabasa ese aya pamwe chete anogonesa masero kukura nekushanda nemazvo. Kunzwisisa chimiro nebasa renyuko kwakakosha kwete chete kune sainzi yekutanga asiwo pakukura kwemishonga nebiotechnology. Kudzidza kwakawanda kwenyuko iyi kunoramba kuchigadzira nzira yekuwana zvinhu zvinogona kushandura manzwisisiro atinoita hupenyu nekurapa zvirwere zvakasiyana-siyana.
