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).
