DNA ob lub helix nrhiav tau li cas?
DNA ob lub helix nrhiav tau li cas?

Video: DNA ob lub helix nrhiav tau li cas?

Video: DNA ob lub helix nrhiav tau li cas?
Video: Genetic Testing: What is DNA? How do you interpret a mutation? 2024, Hlis ntuj nqeg
Anonim

Cov Discovery ntawm DNA cov Qauv. Tsim los ntawm Rosalind Franklin siv cov txheej txheem hu ua X-ray crystallography, nws tau nthuav tawm helical puab ntawm DNA molecule. Watson thiab Crick paub qhov ntawd DNA tau tsim los ntawm ob txoj hlua ntawm nucleotide khub uas encode cov ntaub ntawv caj ces rau txhua yam muaj sia.

Kuj nug, ob lub helix nrhiav tau li cas?

Nws feem ntau ntseeg tias James Watson thiab Francis Crick nrhiav pom ob lub helix zoo li DNA. Tab sis qhov tseeb, lawv ua raws lawv txoj haujlwm ntawm ib tus ntawm lawv cov npoj yaig ntawm King's College hauv London - Rosalind Franklin, tus kws tshaj lij x-ray diffraction uas nws cov duab ntawm DNA proteins thaum ntxov xyoo 1950 tau nthuav tawm cov duab helix.

Tsis tas li ntawd, leej twg xub pom DNA? Ntau tus neeg ntseeg tias American biologist James Watson thiab English physicist Francis Crick nrhiav pom DNA hauv xyoo 1950. Qhov tseeb, qhov no tsis yog li ntawd. Hloov chaw, DNA tau pom thawj zaug hauv 1860s lig los ntawm Swiss chemist Friedrich Miescher.

Hauv qhov no, thaum twg DNA ob lub helix nrhiav tau?

1953, Leej twg nrhiav tau ob helical qauv ntawm DNA thiab thaum twg?

Francis Crick

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