Yuav ua li cas eukaryotes ceev cov txheej txheem ntawm replication?
Yuav ua li cas eukaryotes ceev cov txheej txheem ntawm replication?

Video: Yuav ua li cas eukaryotes ceev cov txheej txheem ntawm replication?

Video: Yuav ua li cas eukaryotes ceev cov txheej txheem ntawm replication?
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Yuav ua li cas eukaryotes ceev cov txheej txheem ntawm replication - vim lawv muaj ntau yam chromosomes ntev? DNA yuav tsum "unzip" rau rov ua dua . DNA strands yog complementary.

Ua li no, DNA replication tshwm sim sai npaum li cas hauv eukaryotes?

Hauv kev sib piv, eukaryotic tshuaj tib neeg DNA replicates ntawm tus nqi ntawm 50 nucleotides ib ob. Hauv ob qho xwm txheej, rov ua dua tshwm sim sai sai vim tias ntau yam polymerases tuaj yeem sib txuas ob txoj hlua tshiab tib lub sijhawm los ntawm kev siv txhua qhov tsis muaj kab mob los ntawm qhov qub. DNA muab ob npaug rau helix ua tus qauv.

Qhov thib ob, lub xov tooj ntawm tes ua kom cov txheej txheem rov ua dua li cas? Ntxiv ntawm ntau eukaryotes complexes thiab qee qhov Rep ( rov ua dua enhancer proteins) ceev nce tus txheej txheem ua dna rov ua dua ua kom nws siv tau ntau dua rau peb… Ua kom ntau ntxiv rov ua dua diav rawg. Nce ntawm qhov tseem ceeb ntawm kev nyeem ntawv pov thawj txheej txheem hauv dna rov ua dua.

Qhov thib ob, dab tsi yog cov txheej txheem ntawm DNA replication hauv eukaryotes?

Eukaryotic DNA replication yog ib tug conserved mechanism uas txwv DNA replication mus rau ib zaug ib lub voj voog ntawm tes. Cov txheej txheem rov ua dua tso cai luam tawm ib zaug DNA muab ob npaug rau helix DNA helices, uas tau muab faib mus rau hauv cov ntxhais hlwb ntawm mitosis.

Cov txheej txheem replication yog dab tsi?

DNA rov ua dua yog cov txheej txheem los ntawm qhov uas ob-stranded DNA molecule yog theej los tsim ob lub DNA zoo tib yam molecules. Rov ua dua yog qhov tseem ceeb txheej txheem vim hais tias, thaum twg ib lub cell faib, ob lub cell tshiab yuav tsum muaj tib cov ntaub ntawv caj ces, lossis DNA, raws li niam txiv cell.

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