Video: Dab tsi khaws chromosomes thiab DNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv nucleus ntawm txhua tus cell , DNA molecule yog ntim rau hauv xov zoo li cov qauv hu ua chromosomes. Txhua chromosome yog tsim los ntawm DNA nruj nreem coiled ntau zaus nyob ib ncig ntawm cov proteins hu ua histones uas txhawb nws qauv.
Ntawm no, dab tsi khaws DNA hauv lub cell?
nucleus
Tsis tas li ntawd, DNA khaws cia hauv chromosome li cas? Chromosomes . Yog koj coj lub DNA los ntawm tag nrho cov hlwb nyob rau hauv koj lub cev thiab lined nws, mus txog rau thaum xaus, nws yuav tsim ib tug strand 6000 lab mais ntev (tab sis heev, nyias heev)! Txhawm rau khaws cov khoom tseem ceeb no, DNA molecules yog nruj nreem ntim ntawm cov proteins hu ua histones los ua cov qauv hu ua chromosomes.
Ib yam li ntawd, puas yog DNA ib txwm khaws cia hauv chromosomes?
DNA khaws cia hauv chromosomes Lub cell nucleus yog qhov tseem ceeb tshaj plaws organelle, thiab nws nyob ntawm no uas peb pom peb DNA (deoxyribonucleic acid) tau ntim nruj rau hauv cov qauv hu ua chromosomes . Chromosomes yog cov xov ntev zoo li cov qauv ua los ntawm ib DNA molecule thiab protein. Tib neeg lub hlwb muaj 23 khub ntawm chromosomes.
Dab tsi khaws cov ntaub ntawv caj ces hauv DNA?
Cov ntaub ntawv caj ces yog khaws cia nyob rau hauv ib theem ntawm cov hauv paus raws li ib tug nucleic acid saw. Cov hauv paus muaj cov cuab yeej tshwj xeeb ntxiv: lawv tsim cov khub tshwj xeeb nrog ib leeg uas ruaj khov los ntawm hydrogen bonds. Lub hauv paus khub ua rau muaj kev tsim ntawm ob lub helix, ib qho qauv helical uas muaj ob txoj hlua.
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Dab tsi yog qhov txawv ntawm chromosomes chromatids thiab homologous chromosomes?
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Vim li cas DNA khaws cia hauv chromosomes hauv eukaryotes?
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