Avv DNA - waa fududahay!

More on biology casharo waxaan ogaaday in DNA - caalamiga ah side of hidde macluumaadka oo dhan nool dadkuba, marka laga reebo RNA fayrusyada. Avv DNA - habka ah in uu yahay lagama maarmaan u ah abuurista cusub acids deoxyribonucleic.

Britain DNA ayaa markii ugu horaysay la helay Qarnigii 20aad, laba cilmibaadhe oo ahaa J. Watson oo Crick, taas oo ay, dhab ahaantii, helay caanka ah ee Nobel Prize. The Britain DNA aad - dun double taas oo qaloocdo galay muquuninta ah. daah The ka kooban yihiin nucleotides, taas oo ku xiran yihiin ee taxanahan. nucleotide A waxaa ka mid ah mid salka (nitrogenous), taas oo saytosayn afar keliya, thaymiin, adenayn iyo gu'anayn. Waxaa saldhigyadii, kuwaas oo la xiriira deoxyribose iyo aasaaska aad ee kooxda phosphate waxaa ku lifaaqan.

Avv DNA - tani ma aha habka adag, sida ay u muuqato at jaleecada hore. Haddii aad u malaynayso oo ku saabsan, in aad marka hore u baahan tahay si ay u fahmaan waxa ereygu wuxuu. Tani geeddi-socodka ee isku wax hal unug. formation a Britain DNA cusub qaadataa meel ku dhowr marxaladood:

1. topoisomerase DNA, been hore ee fargeeto taranka, dhimaysa DNA ah si ay u fududeeyaan ay unwinding iyo unwinding.
2. DNA helicase ka dib markii topoisomerase saamayn habka of "unwound" ee DNA galool.
3. DNA-qabanaya borotiinada ku qabanaya DNA qaybood loo sameeyaa, iyo dhaqanka ay xasilinta, ka hortagga iyaga ka nqoday in kasta oo kale.
4. DNA polymerase daydaa hoosaad DNA circuit hogaanka.

Kuwani afar tallaabo oo dhamaadka ereygu wuxuu, iyo Wabiyadan socota ee Britain ayaa DNA waalidka. this ereygu ka dib danbayso circuit.

1. Ka dib markii mid ka mid strand ee DNA loo xasilin doono iyo Unbraid DNA polymerase "Alfa" ayaa lagu xiri doonaa si ay taas qaban-ka loo yaqaan ereygu wuxuu Primer. Waa in la ogaadaa in lagu jiro marxaladan, Avv jab RNA ah. Taasi waa in geeddi-socodka ah ee formation of DNA cusub u taagoo jidhku u baahan yahay iyo ribonucleotides. Ka dib markii Avv, eulayska laga saaro qaybood DNA ah, kaas oo markii hore ku lifaaqan. enzyme soo socota The kaas oo ku lifaaqan dunta, epsilon doonaa DNA polymerase.
2. enzyme The kor ku xusan waxay ku waddaa inay sii dheereysato Primer ah, laakiin wuxuu isticmaalaa for this deoxyribonucleotides, ribonucleotides halkii sida enzyme Alfa is-cinwaankeedu ah. Tani waxa ay keentey in silsilad oo dhan oo ka kooban laba qaybood: DNA iyo RNA. Tani enzyme laga saaro ka silsilad markii la helay by hore Primer jab.
3. DNA polymerase "beta" in ay tirtirto bedelay ee ribonucleotides iyo iyaga deoxyribonucleotides.
4. ligase DNA crosslinks labada jajab Okazaki. At in ay joojiso Avv DNA. Kani waa heerka ugu dambeeya ee.

Maxaa loogu baahan yahay ereygu DNA ah iyo sababta geedi socodkan waxa weeye sidaas muhiim u tahay? Si taas loo fahmo, waxaan u baahan ka tarjumayaan oo kaliya waxa aan ugu baahan nahay in deoxyribonucleic acid. Shaqadooda ugu weyn - kaydinta macluumaad hidde, taas oo markii danbe la isugu gudbin doonaa farcankaaga. Waa shaqo iyo waxa sababa sida muhiimada sare ah DNA. Sababo la xaqiiqada ah in ay u qabataa dhammaan macluumaadka ku saabsan hiddo, waxaa la siiyaa waxbarasho ee muhiimadda gaar ah. Waxaan rajaynaynaa in saynisyahano gaari doonaan guul weyn duurka this sayniska.