2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Thaum kev sau ntawv, ib qho ribonucleotide ntxiv rau DNA template strand yog ntxiv rau qhov loj hlob RNA strand thiab covalent phosphodiester daim ntawv cog lus yog tsim los ntawm lub cev qhuav dej synthesis ntawm cov nucleotide tshiab thiab qhov kawg. ib ntxiv.
Ribonucleotides ntxiv nyob qhov twg ntawm qhov loj hlob RNA molecule thaum transcription?
txheej txheem no "tidies" cov molecule thiab tshem tawm nucleotides uas tsis koom nrog cov protein ntau lawm (Daim duab 6). Tom qab ntawd, ib ntu ntawm adenine nucleotides hu ua poly-A tail yog ntxiv rau 3 'kawg ntawm mRNA molecule (Daim duab 7).
Nucleotides ntxiv nyob rau qhov twg?
Thaum kev hloov pauv tau pib, DNA ob chav helix unwinds thiab RNA polymerase nyeem cov qauv strand, ntxiv nucleotides rau the 3′ kawg ntawm cov saw loj hlob(Daim duab 2b).
Yuav ua li cas thaum lub sijhawm sau ntawv?
Kev txhais lus yog cov txheej txheem uas cov ntaub ntawv hauv ib txoj hlua DNA tau theej rau hauv tshiab molecule of messenger RNA (mRNA). … Cov tshiab mRNA cov ntawv luam ntawm cov noob ces ua daim ntawv qhia txog cov protein synthesis thaum tus txheej txheem ntawm kev txhais lus.
Yuav ua li cas thaum pib sau ntawv?
Kev pib sau ntawv yog theem thaum lub sijhawm thawj nucleotides hauv RNA saw tau tsim. Nws yog txheej txheem ntau yam uas pib thaum RNAP holoenzyme khi rau DNA qauv thiab xaus thaumcore polymerase khiav tawm ntawm tus txhawb nqa tom qab synthesis ntawm kwv yees li thawj cuaj nucleotides.
Pom zoo:
Dab tsi yog qhov hloov pauv thiab hloov pauv hloov pauv?
Point mutations hloov ib leeg nucleotide. Frameshift kev hloov pauv yog ntxiv lossis tshem tawm ntawm nucleotides uas ua rau muaj kev hloov pauv hauv kev nyeem ntawv. frameshift thiab point mutation yog dab tsi? Ib qho kev hloov pauv cuam tshuam rau ib khub hauv paus.
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Puas yog jurassic ntiaj teb hloov pauv hloov pauv hloov pauv?
Qee zaum, paub meej, koj yuav tau rov qab mus rau lub sijhawm dhau los - txuag manually, thiab feem ntau, raws li game's autosave yog… tsis zam txim - tab sis feem ntau ntawm cov lub sijhawm koj tuaj yeem khaws cov khoom thiab khaws cia nrog.
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
