Video: Lub hom phiaj ntawm DNA polymerase 1 yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
DNA polymerase kuv (or Pol I) yog ib qho enzyme uas koom nrog hauv cov txheej txheem ntawm prokaryotic DNA replication . Lub physiological muaj nuj nqi ntawm Pol Kuv yog mas kho tej kev puas tsuaj nrog DNA , tab sis nws kuj pab txuas Okazaki fragments los ntawm kev rho tawm RNA primers thiab hloov cov strand nrog DNA.
Yog li ntawd, tib neeg puas muaj DNA polymerase 1?
Kab mob muaj tsuas yog ib qhov chaw ntawm lawv cov chromosome qhov twg DNA synthesis pib, thaum cov kab mob siab dua nyiam tib neeg muaj ob peb ntawm txhua tus ntawm lawv cov chromosomes. Ib zaug DNA helicase khi rau lub DNA , nws cais ob strands-qhov no tso cai DNA polymerase 1 txuas thiab pib luam cov DNA.
Tsis tas li ntawd, qhov txawv ntawm DNA polymerase 1 thiab 3 yog dab tsi? DNA polymerase 3 yog qhov tseem ceeb rau kev rov ua dua ntawm cov thawj coj thiab cov lagging strands whereas DNA polymerase 1 Nws yog ib qho tseem ceeb rau kev tshem tawm ntawm RNA primers los ntawm cov khoom tawg thiab hloov nws nrog cov nucleotides xav tau. Cov enzymes no tsis tuaj yeem hloov ib leeg li ob leeg muaj txawv cov haujlwm yuav tsum tau ua.
Ua raws li qhov xav tau, lub luag haujlwm ntawm DNA polymerase 1 thiab 3 yog dab tsi hauv DNA replication?
Lub xwb Lub luag haujlwm ntawm DNA polymerase Kuv yuav tsum hydrolyse RNA primer thiab sau rau hauv qhov khoob nrog complementary deoxyribonucleoside triphosphates thiab qhov kawg ntawm DNA replication . DNA polymerase III muaj 3 ua haujlwm : Xaiv thiab ntxiv dawb deoxyribonucleoside triphosphates ntxiv rau DNA template hlua.
DNA polymerase ua haujlwm li cas?
Cov DNA polymerases yog cov enzymes uas tsim DNA molecules los ntawm assembling nucleotides, lub tsev blocks ntawm DNA . Cov enzymes no tseem ceeb rau DNA replication thiab feem ntau ua haujlwm nyob rau hauv khub los tsim ob zoo tib yam DNA strands los ntawm ib qho qub DNA molecule.
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