Dab tsi yog qhov yuav tsum tau rau DNA replication?
Dab tsi yog qhov yuav tsum tau rau DNA replication?

Video: Dab tsi yog qhov yuav tsum tau rau DNA replication?

Video: Dab tsi yog qhov yuav tsum tau rau DNA replication?
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Tshiab DNA yog tsim los ntawm enzymes hu ua DNA polymerases, uas xav tau ib tug template thiab primer (pib) thiab synthesize DNA nyob rau hauv lub 5' rau 3' kev taw qhia. DNA replication xav tau lwm cov enzymes ntxiv rau DNA polymerase , suav nrog DNA qhov tseem ceeb, DNA helicase, DNA ligase, thiab topoisomerase.

Ib yam li ntawd ib tug yuav nug, dab tsi yog 4 kauj ruam ntawm replication?

  • Kauj ruam 1: Replication Fork Formation. Ua ntej DNA tuaj yeem rov ua dua, ob chav stranded molecule yuav tsum tau "unzipped" rau hauv ob qho tib si.
  • Kauj ruam 2: Primer Binding. Qhov kev coj ua strand yog qhov yooj yim tshaj plaws rau replicate.
  • Kauj Ruam 3: Elongation.
  • Kauj Ruam 4: Kev txiav txim.

Tsis tas li ntawd, ATP puas xav tau rau DNA replication? DNA replication yuav tsum ceev thiab raug. Ob tug replicating diav rawg yog tsim. Qhov kev xav no xav tau ATP . Qhov nthuav tawm ib leeg-stranded DNA yog tiv thaiv los ntawm ib leeg-strand binding proteins (ssb).

Raws li txoj cai, 3 kauj ruam ntawm DNA replication yog dab tsi?

Cov kab ke ntawm cov hauv paus encodes cov ntaub ntawv genetic. Peb kauj ruam hauv qhov txheej txheem DNA replication yog pib, elongation thiab kev txiav txim.

Lub ntsiab lus ntawm DNA replication yog dab tsi?

Lub hom phiaj ntawm DNA replication yog tsim tau ob daim ntawv theej tib yam ntawm a DNA molecule. Qhov no yog qhov tseem ceeb rau kev faib cov cell thaum loj hlob lossis kho cov ntaub so ntswg puas. DNA replication xyuas kom txhua lub xov tooj tshiab tau txais nws tus kheej daim ntawv theej DNA.

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