Video: Dab tsi yog theem tertiary ntawm DNA qauv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tertiary qauv hais txog qhov chaw ntawm cov atoms nyob rau hauv peb-dimensional qhov chaw, coj mus rau hauv kev txiav txim siab geometrical thiab steric txwv. Nws yog ib qho kev txiav txim siab tshaj qhov thib ob qauv , nyob rau hauv uas loj-scale folding nyob rau hauv ib tug linear polymer tshwm sim thiab tag nrho cov saw yog folded rau hauv ib tug tshwj xeeb 3-dimensional duab.
Tsis tas li ntawd, DNA puas muaj tertiary qauv?
Txawm tias ib leeg-stranded DNA muaj qee tertiary qauv , qhov no qauv feem ntau tsis ruaj khov li ntawm ib qho RNA ntawm tib theem.
Ib tug kuj yuav nug, dab tsi yog nucleic acid piav qhia cov qauv ntawm DNA? Nucleic acids yog cov polymers loj tsim los ntawm kev sib txuas nucleotides ua ke thiab muaj nyob hauv txhua lub cell. Deoxyribonucleic kua qaub ( DNA ) yog nucleic acid uas khaws cov ntaub ntawv ntawm caj ces. Yog tag nrho DNA Nyob rau hauv ib tug raug mammalian cell twb stretched mus rau thaum xaus, nws yuav ntev tshaj 2 m.
Ntxiv mus, dab tsi yog thawj thiab theem nrab qauv ntawm DNA?
Thawj qauv : sequence of bases in a strand (e.g., ATTTTCGTAAAGGCGTAAAAGGCCTTTTGTC….) Secondary qauv : Kev sib cuam tshuam ntawm cov hauv paus kom tsim tau ntau dua cov qauv . DNA tus qauv thib ob nyiam ua ob lub helix, thaum RNA feem ntau muaj intramolecular bondind uas tsim cov khoom xws li hairpin loops, thiab lwm yam.
Dab tsi yog qhov sib txuas ntawm deoxyribose thiab lub hauv paus?
Hom no daim ntawv cog lus hu ua glycosidic daim ntawv cog lus . Cov pab pawg phosphate forms a daim ntawv cog lus nrog rau deoxyribose qab zib los ntawm ib qho ester kev sib raug zoo ntawm ib qho ntawm nws cov pa oxygen tsis zoo thiab 5 '-OH ntawm cov suab thaj ().
Pom zoo:
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