2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
DNA yog ib qho dynamic thiab hloov tau molecule. Xws li, cov nucleotide sequences pom nyob rau hauv nws yuav raug hloov raws li qhov tshwm sim ntawm ib tug tshwm sim hu ua mutation. Nyob ntawm seb qhov kev hloov pauv hloov pauv li cas hauv lub cev hloov caj ces, nws tuaj yeem ua pov thawj tsis muaj mob, pab tau, lossis ua rau mob.
Yuav ua li cas thaum hloov nucleotide?
A mutation tuaj yeem hloov pauv tus cwj pwm ntawm txoj hauv kev uas tej zaum yuav pab tau, xws li ua kom lub cev hloov mus rau nws ib puag ncig zoo dua. Qhov kev hloov pauv yooj yim tshaj plaws yog qhov hloov pauv hloov pauv. Qhov no tshwm sim thaum ib lub hauv paus nucleotide hloov mus rau lwm qhov hauv DNA ib ntus. Kev hloov pauv tuaj yeem ua rau cov amino acid tsis raug tsim tawm.
Yuav ua li cas yog tias ib qho nucleotide hloov pauv hauv codon?
Kev hloov pauv tsis tseem ceeb yog hais txog kev hloov pauv hauv lub hauv paus uas hloov pauv nucleotide hloov cov codon rau hauv qhov nres codon. Qhov kev hloov pauv no ua rau kev txiav tawm ntxov ntxov ntawm kev txhais lus, uas tuaj yeem cuam tshuam rau kev tsim cov proteins.
Puas yuav hloov pauv ntawm nucleotide ib ntu ntawm DNA hloov cov qauv ntawm cov protein?
Nqe Lus Nug: 1. Puas yuav muaj kev hloov pauv ntawm nucleotide ib ntu ntawm DNA hloov cov qauv ntawm cov protein? Nws yuav tsis cuam tshuam cov protein; Kev hloov pauv hauv DNA tsis hloov pauv cov protein ntau. Ib lub hauv paus sib npaug ib qho amino acid, yog li yog tias muaj kev hloov pauv hauv lub hauv paus, nws hloov cov amino acid, ib yam nkaus.
Yuav ua li cas hloov ib nucleotide hauv ibDNA molecule ntawm lub cell yuav hloov cov qauv ntawm cov protein uas tsim los ntawm lub cell?
Hloov cov kab ke ntawm nucleotides hauv DNA molecule tuaj yeem hloov cov amino acids hauv cov protein kawg, ua rau protein malfunction. Yog tias insulin tsis ua haujlwm raug, nws yuav tsis tuaj yeem khi rau lwm cov protein (insulin receptor).
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?
