Video: Ob tus kws tshawb fawb tau tsim cov qauv ntawm DNA teb li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Teb thiab piav qhia:
James Watson thiab Francis Crick tau txais txiaj ntsig los ntawm kev tsim cov qauv ntawm DNA hauv xyoo 1953
Ntxiv mus, ob tus kws tshawb fawb tau tsim cov qauv ntawm DNA Brainly?
Raws li Rosalind Franklin's X-ray crystallography cov txiaj ntsig thiab lwm yam kev tshawb fawb yav dhau los, James Watson thiab Francis Crick ua tus qauv tseeb ntawm cov qauv ntawm DNA.
Ib sab saum toj no, leej twg nrhiav tau ob lub helix qauv ntawm DNA? James Watson
Yog li ntawd, leej twg tsim cov qauv ntawm DNA?
Qhov Discovery ntawm DNA's Structure. Coj hauv xyoo 1952, daim duab no yog thawj daim duab X-ray ntawm DNA, uas coj mus rau kev tshawb pom ntawm nws cov qauv molecular los ntawm Watson thiab Crick . Tsim los ntawm Rosalind Franklin siv cov txheej txheem hu ua X-ray crystallography, nws nthuav tawm cov duab helical ntawm DNA molecule.
Dab tsi yog sab ntawm DNA ntaiv ua los ntawm?
Cov sab ntawm ntaiv yog ua los ntawm alternating qab zib thiab phosphate molecules. Cov piam thaj yog deoxyribose. 2 sided kauv Lub rungs ntawm lub ntaiv yog khub ntawm 4 hom nitrogen hauv paus.
Pom zoo:
Cov kws tshawb fawb twg hais tias txhua tus tsiaj yog tsim los ntawm cov hlwb?
Nws tau lees tias qhov kev xav no yog nws tus kheej, txawm tias BarthelemyDumortier tau hais nws ntau xyoo ua ntej nws. Qhov txheej txheem crystallization no tsis tau txais nrog kev xav ntawm tes niaj hnub. Xyoo 1839, Theodor Schwann tau hais tias nrog rau cov nroj tsuag, tsiaj txhu muaj cov hlwb lossis cov khoom ntawm cov hlwb hauv lawv cov qauv
Tus kws tshawb fawb tau tshawb pom neutrons li cas?
Nws yog qhov zoo tshaj plaws uas cov neutron tsis tau tshawb pom txog thaum xyoo 1932 thaum James Chadwick siv cov ntaub ntawv tawg los mus xam qhov loj ntawm qhov nruab nrab no
Dab tsi yog cov cuab yeej lossis cov ntaub ntawv uas tus Kws Tshawb Fawb xav tau los txheeb xyuas cov ntaub ntawv nug?
Cov ntaub ntawv raug nug hauv chav kuaj ua txhaum cai yog nruab nrog lub tshuab ntsuas ntsuas, ntsuas cov duab digital, infrared thiab ultraviolet lub teeb ci, cov cuab yeej tshuaj ntsuam video thiab cov cuab yeej tshwj xeeb suav nrog cov khoom siv hluav taws xob tshawb pom electrostatic (EDD) thiab cov khoom siv los ua chemistry
Cov txheej txheem dab tsi uas tus kws tshawb fawb siv los tsim ntau cov ntawv luam ntawm DNA xav tau sau rau hauv daim ntawv dawb paug 1?
Molecular Cloning. Cloning tso cai rau tsim ntau cov ntawv luam ntawm cov noob, qhia cov noob, thiab kawm txog cov noob tshwj xeeb. Yuav kom tau txais cov DNA tawg rau hauv cov kab mob hauv cov kab mob hauv daim ntawv uas yuav tau theej lossis nthuav tawm, cov khoom tawg yog thawj zaug tso rau hauv plasmid
Tus qauv qauv yog dab tsi Qhov txawv ntawm tus qauv qauv thiab tus qauv molecular yog dab tsi?
Cov mis mos molecular siv cov cim tshuaj thiab cov ntawv sau npe los qhia cov naj npawb ntawm cov atoms sib txawv hauv cov molecule lossis compound. Ib qho empirical formula muab qhov yooj yim tshaj plaws, tag nrho tus lej piv ntawm atoms hauv ib qho chaw. Cov qauv qauv qhia txog kev sib koom ua ke ntawm cov atoms hauv cov molecule