Video: Vim li cas txhua yam muaj sia yuav tsum muaj DNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tag nrho tus muaj sia nyob yuav tsum muaj vim nws ua raws li cov khoom siv caj ces ( muaj noob) uas khaws cov ntaub ntawv lom neeg. Ntxiv mus, DNA encodes cov kab ke ntawm cov amino acid residues (rau protein synthesis) siv ib tug triplet code ntawm neucleotides (genetic code) tom qab transcribing rau RNA.
Tsis tas li ntawd, vim li cas txhua yam muaj sia muaj DNA?
Deoxyribonucleic acid ( DNA ) yog ib qho nucleic acid uas muaj cov lus qhia caj ces rau kev txhim kho thiab kev ua haujlwm ntawm yam muaj sia . Tag nrho paub cellular lub neej thiab ib co kab mob muaj DNA . Lub luag haujlwm tseem ceeb ntawm DNA yog encode cov kab ke ntawm cov amino acid residues nyob rau hauv cov proteins, siv cov noob caj noob ces code.
Tsis tas li ntawd, puas yog txhua yam muaj sia nyob sib koom DNA? Txhua yam muaj sia nyob khaws cov ntaub ntawv genetic siv tib lub molecules - DNA thiab RNA. Sau nyob rau hauv genetic code ntawm cov molecules yog compelling pov thawj ntawm lub qhia caj ces ntawm txhua yam muaj sia.
Ib yam li ntawd, tej zaum koj yuav nug, dab tsi muaj sia nyob tsis muaj DNA?
HIV, tus kab mob uas ua rau muaj kev pab, yog ib qho piv txwv ntawm tus kab mob uas nws cov khoom siv caj ces yog RNA, tsis yog DNA . Txawm hais tias kab mob los yog tsis raug suav tias muaj sia nyob yog nyob ntawm koj lub ntsiab lus ntawm lub neej. Lawv tsis pub dawb nyob , tab sis lawv muaj peev xwm ntawm replicating thiab evolving.
Puas muaj lub neej tsis muaj DNA?
DNA yog ib daim ntawv zoo nkauj ntawm RNA. Qee cov kab mob thiab qee cov kab mob muaj RNA hloov DNA rau lawv coding khoom. Nyob ntawd yog tsis muaj lub neej tsis muaj RNA. RNA lub DNA muaj ob txoj haujlwm, 1) ua daim ntawv qhia tseeb thiab 2) ua cov proteins uas ua rau lub cev ntawm tus neeg.
Pom zoo:
Tus yam ntxwv twg yog qhia los ntawm txhua yam muaj sia?
Hmoov zoo, biologists tau tsim cov npe ntawm yim yam ntxwv sib koom los ntawm txhua yam muaj sia. Cov yam ntxwv yog qhov zoo lossis qhov zoo. Cov yam ntxwv no yog lub koom haum ntawm tes, kev yug me nyuam, metabolism, homeostasis, heredity, teb rau stimuli, kev loj hlob thiab kev loj hlob, thiab adaptation los ntawm evolution
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