Video: Francis Crick pab txhawb rau kev tshawb pom DNA li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Francis Crick , James Watson thiab Maurice Wilkins tau sib koom xyoo 1962 Nobel Prize for Physiology lossis Tshuaj rau kev daws cov qauv ntawm DNA . Txoj kev xav ntawm RNA coding tau sib cav thiab sib tham, thiab xyoo 1961, Francis Crick thiab Sydney Brenner tau muab cov pov thawj caj ces uas tus lej triplet tau siv los nyeem cov khoom siv caj ces.
Raws li txoj cai, Rosalind Franklin tau pab txhawb qhov kev tshawb pom DNA li cas?
Franklin paub zoo tshaj plaws rau nws txoj haujlwm ntawm X-ray diffraction dluab ntawm DNA , tshwj xeeb yog Daim Duab 51, thaum nyob hauv King's College London, uas coj mus rau nrhiav pom ntawm DNA ob lub helix uas James Watson, Francis Crick thiab Maurice Wilkins tau qhia txog Nobel nqi zog hauv Physiology lossis Tshuaj hauv xyoo 1962.
Tom qab ntawd, lo lus nug yog, James Watson thiab Francis Crick nrhiav tau dab tsi? James Watson yog ib tug pioneer molecular biologist uas tau qhab nia, nrog rau Francis Crick thiab Maurice Wilkins, nrog nrhiav pom ob helix qauv ntawm DNA molecule. Cov trio yeej Nobel nqi zog hauv tshuaj hauv xyoo 1962 rau lawv txoj haujlwm.
Kuj paub yog, nrhiav tau DNA pab tshuaj li cas?
Cov nrhiav pom DNA thiab kev txheeb xyuas ntawm nws tus qauv yog ib qho kev tawg loj hauv kev tshawb fawb. Nws piav qhia txog cov qauv uas tuaj yeem siv rau cov hlwb hauv lub cev. Cov ntaub ntawv no tso cai kho mob cov kws tshawb fawb los txhim kho kev kho mob thiab kev sim raws li qhov kev paub no.
Rosalind Franklin pab txhawb rau zej zog li cas?
Rosalind Elsie Franklin (25 Lub Xya Hli 1920 - 16 Lub Plaub Hlis 1958)[1] yog ib tug kws tshawb fawb Askiv thiab X-ray crystallographer uas tau ua qhov tseem ceeb. kev pab kom nkag siab txog cov qauv zoo molecular ntawm DNA, RNA, kab mob, thee thiab graphite. Nws tuag hauv 1958 thaum muaj hnub nyoog 37 xyoo los ntawm cov teeb meem tshwm sim los ntawm kev mob qog noj ntshav zes qe menyuam.
Pom zoo:
Dab tsi yog 5 txoj haujlwm loj ntawm kev kawm uas pab txhawb rau kev tshawb fawb ib puag ncig?
Tsib txoj haujlwm tseem ceeb ntawm kev kawm yog biology, kawm txog cov kab mob nyob; Lub ntiaj teb kev tshawb fawb, kev tshawb fawb ntawm lub ntiaj teb tsis muaj sia nyob thiab lub ntiaj teb; physics, kev kawm txog cov teeb meem thiab lub zog; chemistry, kev kawm txog tshuaj thiab lawv cov kev sib cuam tshuam, thiab kev tshawb fawb txog kev sib raug zoo, kev kawm txog tib neeg cov pejxeem
Erwin Chargaff pab txhawb dab tsi rau kev tshawb pom DNA?
Los ntawm kev sim ua tib zoo, Chargaff tau tshawb pom ob txoj cai uas tau pab coj mus rau kev tshawb pom ntawm ob chav helix qauv ntawm DNA. Thawj txoj cai yog hais tias nyob rau hauv DNA tus naj npawb ntawm guanine units yog sib npaug zos rau cov cytosine units, thiab tus naj npawb ntawm adenine units yog sib npaug zos rau cov thymine units
Dab tsi yog qhov kev tshawb pom uas txhawb nqa kev nthuav dav hauv hiav txwv?
Cov ntaub ntawv pov thawj rau Sea-Floor Spreading. Ob peb hom pov thawj txhawb Hess txoj kev xav ntawm hiav txwv-floorspreading: eruptions ntawm molten khoom, sib nqus kab txaij nyob rau hauv lub pob zeb ntawm lub hiav txwv pem teb, thiab lub hnub nyoog ntawm lub rocksthem tus kheej. Cov pov thawj no ua rau cov kws tshawb fawb rov qab saib dua ntawm Wegener'shypothesis ntawm kev sib tw sab av loj
Dab tsi yog chromosome txoj kev xav ntawm kev qub txeeg qub teg thiab nws cuam tshuam li cas rau Mendel qhov kev tshawb pom?
Piav Mendel cov lus xaus txog qhov zoo li cas dhau ntawm ib tiam dhau ib tiam. Lub chromosome txoj kev xav ntawm kev qub txeeg qub teg hais tias cov yam ntxwv qub txeeg qub teg yog tswj los ntawm cov noob nyob rau ntawm chromosomes ncaj ncees kis los ntawm gametes, tswj cov caj ces txuas ntxiv ntawm tiam mus rau ib tiam
Thaum twg Rosalind Franklin pab txhawb rau kev tshawb pom DNA?
Franklin paub zoo tshaj plaws rau nws txoj haujlwm ntawm X-ray diffraction dluab ntawm DNA, tshwj xeeb tshaj yog Diam duab 51, thaum nyob rau ntawm King's College London, uas coj mus rau qhov kev tshawb pom ntawm DNA ob helix rau James Watson, Francis Crick thiab Maurice Wilkins tau koom lub Nobel. Nqi zog hauv Physiology lossis Tshuaj hauv xyoo 1962