Dab tsi yog cov ntaub ntawv DNA polymerase xav tau?
Dab tsi yog cov ntaub ntawv DNA polymerase xav tau?

Video: Dab tsi yog cov ntaub ntawv DNA polymerase xav tau?

Video: Dab tsi yog cov ntaub ntawv DNA polymerase xav tau?
Video: Пеб цев нейг тауг уа саб уа суа 20.07.2017 2024, Kaum ib hlis
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Txhawm rau pib qhov kev tawm tsam no, DNA polymerase xav tau ib tug primer nrog ib tug dawb 3'-hydroxyl pab pawg twb puag-paired rau lub template. Lawv tsis tuaj yeem pib los ntawm kos los ntawm kev ntxiv nucleotides rau ib leeg-kho dawb DNA tus qauv. RNA polymerase , nyob rau hauv sib piv, ua tau pib RNA synthesis tsis muaj primer (Tshooj 28.1. 4).

Hauv qhov no, cov ntaub ntawv dab tsi DNA polymerase xav tau txhawm rau txhawm rau ua kom tiav ib txoj hlua DNA?

DNA polymerase tsis tuaj yeem tsim cov DNA tshiab yam tsis muaj 3'-OH ua ntej. Yog li, DNA replication yuav tsum muaj RNA primer pib strand tsim. (A) Ua ntej, PriA protein hloov SSB proteins. (B) Thib ob, primase associates nrog cov protein PriA.

Ib yam li ntawd, DNA polymerase xav tau dab tsi los pib replication? Ib tug primer yog ib tug luv luv nucleic acid sequence uas muab a pib taw tes rau DNA synthesis. Lub synthesis ntawm ib tug primer yog tsim nyog vim hais tias cov enzymes uas synthesize DNA , uas hu ua DNA polymerases , tuaj yeem txuas tshiab DNA nucleotides mus rau ib qho strand ntawm nucleotides uas twb muaj lawm.

Raws li txoj cai, DNA polymerase yog dab tsi?

DNA polymerase yog ib qho enzyme uas synthesizes DNA molecules los ntawm deoxyribonucleotides, lub tsev blocks ntawm DNA . Cov enzymes no tseem ceeb rau DNA replication thiab feem ntau ua hauj lwm nyob rau hauv khub los tsim ob zoo tib yam DNA strands los ntawm ib qho qub DNA molecule.

Puas yog DNA polymerase xav tau lub zog?

DNA Polymerase . Cov txheej txheem siv ib qho ntxiv, ib txoj hlua ntawm DNA raws li tus qauv. Cov zog xav tau los tsav cov tshuaj tiv thaiv los ntawm kev txiav siab zog phosphate bonds ntawm nucleotide-triphosphate siv los ua qhov chaw ntawm nucleotides xav tau hauv cov tshuaj tiv thaiv.

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