Dab tsi polymer ua rau peb tus yam ntxwv?
Dab tsi polymer ua rau peb tus yam ntxwv?

Video: Dab tsi polymer ua rau peb tus yam ntxwv?

Video: Dab tsi polymer ua rau peb tus yam ntxwv?
Video: TSIS YOG PEB UA HAUJ LWM ZOO .\\ N.TSHUAV NUM |\ N.IAM VAJ XOB \\ N.TXOOV KAV NKAUJ 2023 2024, Kaum ib hlis
Anonim

Qhov kawg natural polymers yog cov deoxyribonucleic acid ( DNA ) thiab ribonucleic acid (RNA) uas txhais lub neej. Kab laug sab txhob lo lo ntxhuav, plaub hau, thiab horn yog proteinpolymers. Cov hmoov txhuv nplej siab tuaj yeem ua ib qho polymer xws li cellulose inwood.

Yog li ntawd, dab tsi yog qhov tseem ceeb ntawm DNA?

DNA qauv DNA yog tsim los ntawm cov molecules hu ua nucleotides. Txhua nucleotide muaj ib pab pawg phosphate, ib pawg suab thaj thiab cov hauv paus anitrogen. Plaub hom nitrogen hauv paus yog adenine (A), thymine (T), guanine (G) thiab cytosine (C). Qhov kev txiav txim ntawm lub hauv paus no yog dab tsi txiav txim DNA cov cov lus qhia, los yog geneticcode.

Dab tsi yog tib neeg DNA ua los ntawm? DNA yog ua los ntawm chemical tsev blocks hu ua nucleotides. Cov tsev blocks no yog ua los ntawm peb feem: ib pawg phosphate, ib pawg suab thaj thiab ib ntawm plaub hom ntawm nitrogen hauv paus. Ua ib txoj hlua ntawm DNA , nucleotides txuas rau hauv cov saw hlau, nrog cov phosphate thiab qab zib pawg hloov pauv.

Hais txog qhov no, cov duab ntawm DNA molecule tau piav qhia li cas?

Cov DNA molecule yog zoo li tus ntaiv uas istwisted mus rau hauv ib co coiled configuration hu ua ob lub helix. Thenitrogen bases tsim cov rungs ntawm tus ntaiv thiab yog npaj inpairs, uas yog kev cob cog rua rau ib leeg los ntawm chemicalbonds.

Dab tsi yog qhov txuas ntxiv ntawm DNA?

ob qho tib si ntawm ob chains uas ua ib tug ob helix ntawm DNA , nrog cov haujlwm sib xws ntawm ob txoj hlua khi ua ke ntawm ib khub ntawm ntxiv hauv paus. ib seem ntawm onenucleic acid saws uas yog sib txuas mus rau lwm qhov los ntawm ib theem ntawm basepairs.

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