Dab tsi yog theem nrab qauv ntawm DNA?
Dab tsi yog theem nrab qauv ntawm DNA?

Video: Dab tsi yog theem nrab qauv ntawm DNA?

Video: Dab tsi yog theem nrab qauv ntawm DNA?
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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.

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