Cov txheej txheem:
Video: Lub nucleotide muaj dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A nucleotide muaj ntawm peb yam: Lub hauv paus nitrogenous, uas tuaj yeem yog adenine, guanine, cytosine, lossis thymine (nyob rau hauv rooj plaub ntawm RNA, thymine yog hloov los ntawm uracil). Ib qho tsib-carbon qab zib, hu ua deoxyribose vim nws tsis muaj cov pa oxygen ntawm ib qho ntawm nws cov carbons. Ib lossis ntau pawg phosphate.
Ib yam li ntawd, 3 ntu ntawm nucleotide yog dab tsi?
Ob leeg deoxyribonucleic acid (DNA) thiab ribonucleic acid (RNA) yog tsim los ntawm nucleotides uas muaj peb ntu:
- Nitrogenous Base. Purines thiab pyrimidines yog ob pawg ntawm nitrogenous hauv paus.
- Pentos Qab Zib. Hauv DNA, cov piam thaj yog 2'-deoxyribose.
- Phosphate Group. Ib pawg phosphate yog PO43-.
Ib sab saum toj no, U nucleotide yog dab tsi? Nucleotide Cov hauv paus siv hauv DNA yog adenine (A), cytosine (C), guanine (G), thiab thymine (T). Hauv RNA, lub hauv paus uracil ( U ) siv qhov chaw ntawm thymine.
Tsis tas li ntawd, cov ntsiab lus dab tsi yuav pom hauv nucleotide?
Cov phosphate pab pawg tso cai rau nucleotides txuas ua ke, tsim cov suab thaj- phosphate qaum ntawm nucleic acid thaum lub hauv paus nitrogenous muab cov tsiaj ntawv ntawm cov tsiaj ntawv caj dab. Cov Cheebtsam ntawm nucleic acids yog tsim los ntawm tsib lub ntsiab: carbon , hydrogen , oxygen , nitrogen , thiab phosphorus.
Leej twg nrhiav tau DNA?
Ntau tus neeg ntseeg tias American biologist James Watson thiab English physicist Francis Crick nrhiav 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.
Pom zoo:
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