![Dab tsi yog lub hauv paus khub rau DNA? Dab tsi yog lub hauv paus khub rau DNA?](https://i.answers-science.com/preview/science/14177393-what-are-the-base-pairs-for-dna-j.webp)
Video: Dab tsi yog lub hauv paus khub rau DNA?
![Video: Dab tsi yog lub hauv paus khub rau DNA? Video: Dab tsi yog lub hauv paus khub rau DNA?](https://i.ytimg.com/vi/1bkKkw0cy7w/hqdefault.jpg)
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txhua pib khub yog tsim los ntawm ob qhov sib ntxiv nucleotides (purine nrog pyrimidine) ua ke los ntawm hydrogen bonds. Cov puag khub hauv DNA yog adenine nrog thymine thiab cytosine nrog guanine. DNA muaj ib tug kauv staircase zoo li tus qauv.
Ua raws li qhov no, dab tsi yog 4 lub hauv paus ntawm DNA?
Txuas rau txhua lub qab zib yog ib qho ntawm plaub hauv paus - adenine (A), cytosine (C), guanine (G), lossis thymine (T). Ob txoj hlua yog tuav ua ke los ntawm hydrogen bonds ntawm lub hauv paus , nrog adenine ua a pib khub nrog thymine, thiab cytosine tsim a pib khub nrog guanine.
Dab tsi yog qhov piv txwv ntawm DNA code rau? Adenine khub nrog thymine, thiab cytosine khub nrog guanine. Cov kab ke ntawm hauv paus hauv ib feem ntawm a DNA molecule, hu ua gene, nqa cov lus qhia xav tau los sib sau ua ke cov protein.
Hauv qhov no, dab tsi yog qhov sib piv ntawm DNA?
npe Genetics. ib qho ntawm cov khub ntawm hydrogen-bonded purine thiab pyrimidine bases uas tsim cov kev sib txuas ntawm qab zib-phosphate qaum ntawm nucleic acid molecules: cov khub yog adenine thiab thymine hauv DNA, adenine thiab uracil hauv RNA, thiab guanine thiab cytosine hauv DNA thiab RNA.
Lub hauv paus khub txoj cai yog dab tsi?
Cov txoj cai ntawm base kev sib tw piav qhia qhov tshwm sim hais tias txawm tus nqi ntawm adenine (A) nyob rau hauv DNA ntawm lub cev, tus nqi ntawm thymine (T) yog tib yam (Chargaff's txoj cai ). Ib yam li ntawd, txawm tus nqi ntawm guanine (G), tus nqi ntawm cytosine (C) yog tib yam.
Pom zoo:
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Ntxiv cov kua qaub ua kom cov concentration ntawm H3O + ions hauv cov tshuaj. Ntxiv ib lub hauv paus txo cov concentration ntawm H3O + ions hauv cov tshuaj. Cov kua qaub thiab lub hauv paus zoo li cov tshuaj tiv thaiv. Yog hais tias lub hauv paus yog ntxiv rau cov kua qaub, cov tshuaj yuav tsis acidic thiab txav mus rau nruab nrab ntawm pH nplai
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Yog li, muaj tag nrho ntawm 25 + 25 = 50 adenine thiab thymine hauv tag nrho. Qhov ntawd tawm 100− 50 = 50 seem hauv paus. Nco ntsoov tias cytosine thiab guanine daim ntawv cog lus nrog ib leeg, thiab yog li lawv sib npaug ntawm cov nyiaj. Tam sim no peb tuaj yeem faib los ntawm 2 kom tau txais tus lej ntawm guanine lossis cytosine hauv paus
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