Video: Dab tsi yog theem nrab qauv ntawm DNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Secondary qauv yog cov txheej txheem ntawm kev sib cuam tshuam ntawm cov hauv paus, piv txwv li, qhov twg ntawm cov hlua khi rau ib leeg. Hauv DNA ob helix, ob strands ntawm DNA yog tuav ua ke los ntawm hydrogen bonds. Cov theem nrab qauv yog lub luag haujlwm rau cov duab uas cov nucleic acid xav tias.
Ib yam li ntawd, qhov txawv ntawm cov qauv thawj thiab theem nrab ntawm DNA yog dab tsi?
Thawj qauv : sequence ntawm bases hauv a strand (e.g., ATTTTCGTAAAGGCGTAAAAGGCCTTTTGTC….) Secondary qauv : Kev sib tham nruab nrab bases tsim ntau complex 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.
Qhov thib ob, dab tsi yog cov qauv ntawm DNA? DNA yog tsim los ntawm cov molecules hu ua nucleotides. Txhua nucleotide muaj ib pawg phosphate, pawg suab thaj thiab nitrogen hauv paus. Plaub hom nitrogen hauv paus yog adenine (A), thymine (T), guanine (G) thiab cytosine (C). Qhov kev txiav txim ntawm cov hauv paus no yog qhov txiav txim siab DNA cov cov lus qhia, los yog genetic code.
Nyob rau hauv no, dab tsi yog lub hauv paus theem nrab thiab tertiary qauv ntawm DNA?
Nucleic acids muaj a thawj , theem nrab, thiab tertiary qauv analogous rau kev faib cov protein qauv . Qhov sib lawv liag ntawm cov hauv paus hauv cov saw nucleic acid muab rau thawj qauv ntawm DNA los yog RNA. Lub hauv paus-pairing ntawm complementary nucleotides muab cov theem nrab qauv ntawm ib tug nucleic acid.
Qhov thib ob qauv ntawm cov protein yog dab tsi?
Protein theem nrab qauv yog daim ntawv peb seem ntawm lub zos ntu ntawm cov proteins . Qhov thib ob feem ntau theem nrab structural Cov ntsiab lus yog alpha helices thiab beta nplooj, txawm tias beta tig thiab omega loops tshwm sim ib yam nkaus.
Pom zoo:
Dab tsi yog thawj theem nrab thiab theem nrab hydrogen?
Primary = hydrogen ntawm ib cov pa roj carbon txuas nrog tsuas yog ib qho ntawm lwm cov carbon. Secondary = ib hydrogen ntawm acarbon txuas rau tsuas yog OB lwm yam carbons. Tertiary = ahydrogen ntawm cov pa roj carbon txuas nrog peb lwm cov pa roj carbon monoxide
Dab tsi yog qhov txawv ntawm qhov loj me thiab theem nrab ntawm kev sib txawv?
Lub hom phiaj tseem ceeb ntawm kev sib txawv yog cov uas tsis tuaj yeem hloov lossis hloov pauv. Piv txwv li, xim, haiv neeg, haiv neeg thiab kev sib deev orientation. Cov yam no hloov tsis tau. Ntawm qhov tod tes, qhov thib ob qhov ntev yog piav raws li cov uas tuaj yeem hloov kho
Tus qauv qauv yog dab tsi Qhov txawv ntawm tus qauv qauv thiab tus qauv molecular yog dab tsi?
Cov mis mos molecular siv cov cim tshuaj thiab cov ntawv sau npe los qhia cov naj npawb ntawm cov atoms sib txawv hauv cov molecule lossis compound. Ib qho empirical formula muab qhov yooj yim tshaj plaws, tag nrho tus lej piv ntawm atoms hauv ib qho chaw. Cov qauv qauv qhia txog kev sib koom ua ke ntawm cov atoms hauv cov molecule
Dab tsi yog qhov txawv ntawm instantaneous thiab nruab nrab ceev dab tsi yog qhov piv txwv loj tshaj ntawm kev ceev ceev?
Qhov nruab nrab ceev yog qhov ceev nruab nrab ntawm lub sijhawm. Instantaneous ceev yuav yog qhov ceev txhua qhov muab tam sim ntawd hauv lub sijhawm ntawd, ntsuas nrog lub ntsuas ntsuas lub sijhawm
Dab tsi yog theem tertiary ntawm DNA qauv?
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 dua li cov qauv thib ob, uas loj-loj 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