2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Discontinous DNA synthesis tshwm sim ntawm 5' kawg mus rau 3' kawg ntawm niam txiv txoj hlua . Txoj hlua no feem ntau hu ua lagging strand. Nws yog ua tiav nyob rau hauv luv luv sequences ntawm nucleotides hu ua Okazaki fragments. Replication ntawm lub lagging strand pib nrog qhov sib ntxiv ntawm RNA primer RNA primer RNA primers nyob rau hauv vivo
Ib chav kawm ntawm enzymes hu ua primases ntxiv ib qho ntxiv RNA primer rau kev nyeem ntawv template de novo ntawm ob qho tib si ua thiab lagging strands. Pib los ntawm qhov pub dawb 3'- OH ntawm cov primer, hu ua primer terminus, DNA polymerase tuaj yeem txuas ntxiv cov hlua khi tshiab. https://en.wikipedia.org › wiki › Primer_(molecular_biology)
Primer (molecular biology) - Wikipedia
Yby the enzyme primase.
Vim li cas DNA synthesis tsis txuas ntxiv?
Ntawm lub qaum lagging strand, kev sib txuas tsis txuas ntxiv, txij li RNA primers tshiab yuav tsum tau ntxiv thaum qhib cov ntawv sib txuas txuas ntxiv kom nthuav tawm cov qauv tshiab. … Qhov tseeb, DNA synthesis tshwm sim raws li ib tug txheej txheem uas muaj ib tug dimeric polymerase molecule nyob rau hauv lub RF.
Ntawm qhov strand ntawm DNA replication yog discontinuous?
Lagging-strand replication yog tsis tu ncua, nrog luv Okazaki fragments raug tsim thiab tom qab txuas ua ke.
YPuas DNA synthesis tas mus li?
Daim duab 3: Kev rov ua dua ntawm DNA txoj hlua yognruam, thaum replication raws lub lagging strand yog discontinuous. Tom qab lub sijhawm luv luv ntawm DNA tau raug mob, kev sib txuas yuav tsum tau mus rau hauv 5 'mus rau 3' kev taw qhia; uas yog, nyob rau hauv cov kev taw qhia opposite uas yog unwinding.
Vim li cas DNA rov ua dua ob qho tib si txuas ntxiv thiab tsis txuas ntxiv?
Kev piav qhia: Hauv DNA ib txoj hlua yog nyob rau hauv 5' mus rau 3' kev taw qhia thiab lwm txoj hlua yog nyob rau hauv 3' mus rau 5' kev taw qhia. Lub DNA polymerase synthesize tus tshiab strand nyob rau hauv 5' rau 3' kev taw qhiayog li ib strand yog synthesized tsis tu ncua thiab lwm yam discontinuously.
Pom zoo:
Puas yog rov tshwm sim dua lossis rov tshwm sim dua?
Reoccur thiab recur yog verbs uas qhia ib lo lus hauv paus. Thaum lawv nyob ze heev ntawm lub ntsiab lus, lawv tsis zoo ib yam. Tej yam uas yog rov tshwm sim dua thiab dhau mus, tej zaum nyob rau ib ntus. Hauv qhov sib piv, ib yam dab tsi uas rov tshwm sim tsuas yog tshwm sim dua tab sis tsis tas yuav rov ua dua.
Lub sijhawm rov ua dua dna yog qhov mob thiab tsis muaj cov enzyme?
Cov txheej txheem pib thaum helicase unwinds ob lub helix thiab cais ob txoj hlua los tsim cov ntaub ntawv sib txawv ntawm rab rawg Replication diav rawg yog tus qauv uas tsim nyob rau hauv ntev helical DNA thaum DNA replication. Nws yog tsim los ntawm helicases, uas rhuav cov hydrogen bonds tuav ob DNA strands ua ke nyob rau hauv lub helix.
Puas ncua kev ncua sijhawm tsis zoo?
As sudden prolonged deceleration after rupture of membranes rupture of membranes Rupture of membranes (ROM) or amniorrhexis is ib lub sij hawm siv thaum cev xeeb tub los piav txog kev tawg ntawm amniotic sac. Feem ntau, nws tshwm sim nyob rau hauv tag nrho lub sij hawm txawm lub sij hawm los yog thaum pib ntawm kev ua hauj lwm.
Lub sijhawm twg yog lub sijhawm rov pib dua txhua hnub?
Txhua qhov nyiaj tau los txhua hnub tshwm sim hauv 24 teev lub sijhawm. Txhua hnub hnub ntawm 4 teev sawv ntxov lub sijhawm neeg rau zaub mov (7AM EST) cov nyiaj tau txais txiaj ntsig txhua hnub rov pib dua, tso cai rau cov neeg ua si tau txais cov nyiaj tshiab txhua hnub.
Thaum twg qhov kev rov tshwm sim tshwm sim?
Thaum Replevin tuaj yeem thov Li no, qhov no yog qhov xwm txheej tshwm sim ntau tshaj plaws uas yuav tshwm sim thaum tus neeg siv khoom tsis raug them nyiaj qiv tsheb. Kev ua txhaum cai ntawm kev thaj yeeb nyab xeeb yog me ntsis luv luv. Nws tsis suav nrog kev txeeb tsheb yam tsis tau ceeb toom lossis kub xov tooj kom tsav tsheb mus.
