Vim li cas koj thiaj tuaj yeem pom lub microscopic DNA yam tsis muaj lub tshuab tsom?
Vim li cas koj thiaj tuaj yeem pom lub microscopic DNA yam tsis muaj lub tshuab tsom?

Video: Vim li cas koj thiaj tuaj yeem pom lub microscopic DNA yam tsis muaj lub tshuab tsom?

Video: Vim li cas koj thiaj tuaj yeem pom lub microscopic DNA yam tsis muaj lub tshuab tsom?
Video: 89TKTHN/ Vim Li Cas koj tso Yexus tseg/ Tus hu Nyaj Xuv Xyooj... 2024, Kaum ib hlis
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Hauv qab a microscope , paub ob-helix molecule ntawm DNA tuaj yeem pom . Vim nws nyias nyias, DNA ua tsis tau pom los ntawm qhov muag liab qab tshwj tsis yog nws cov strands raug tso tawm los ntawm cov nuclei ntawm cov hlwb thiab tso cai rau clump ua ke.

Yog li ntawd, koj puas tuaj yeem pom DNA yam tsis muaj lub tshuab tsom?

DNA yog cov lus qhia tshuaj zoo heev thiab tshwj xeeb uas ua rau txhua yam muaj sia nyob, los ntawm tib neeg mus rau strawberries. Ntau tus neeg xav tias vim li cas DNA me me, peb ua tau 't saib nws tsis muaj muaj zog microscopes . Tab sis qhov tseeb, DNA tau pom tau yooj yim nrog qhov muag liab qab thaum sau los ntawm ntau txhiab lub hlwb.

Tsis tas li ntawd, vim li cas koj thiaj pom DNA koj rho tawm? Cov kws tshawb fawb kawm DNA rau ntau yam: Lawv ua tau xyuas seb cov lus qhia khaws cia hauv li cas DNA pab koj lub cev ua haujlwm zoo. Thaum lub sij hawm a DNA rho tawm , ib tug detergent yuav ua rau lub cell pop qhib, los yog lyse, thiaj li hais tias tus DNA tso rau hauv kev daws teeb meem.

Khaws qhov no hauv kev xav, koj puas tuaj yeem pom ib qho molecule ntawm DNA?

Raws li DNA nws tus kheej tsis muaj cov khoom fluorescent uas ua tau raug exploited rau ib leeg - molecule nrhiav pom, nws yuav tsum tau "stained" kom pom. Feem ntau, fluorescent ligands uas intercalate ntawm lub hauv paus khub los yog khi rau hauv helical grooves yog siv.

Dab tsi yog siv los saib DNA hauv chav kuaj?

Muaj ntau tus kws tshawb fawb siv hluav taws xob, ntsuas qhov tunneling thiab atomic force microscopes rau saib tus kheej DNA molecules,”said Michael W. Davidson, curator ntawm National High Magnetic Field Laboratory ntawm Florida State University.

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