Cov txheej txheem:
- Yuav ua li cas thaum sau npe?
- Lub npe ntawm nucleic acid tsim thaum lub sijhawm hloov pauv yog dab tsi?
- Nucleic acid txhais li cas?
- 4 kauj ruam ntawm kev txhais lus yog dab tsi?
Video: Qhov nucleic acid tsim thaum lub sijhawm sau ntawv?
2024 Tus sau: Fiona Howard | [email protected]. Kawg hloov kho: 2024-01-10 06:38
Lub sijhawm sau ntawv, ib feem ntawm lub cell DNA ua haujlwm ua qauv rau kev tsim ntawm RNA molecule. (RNA, lossis ribonucleic acid, yog tshuaj zoo ib yam li DNA, tshwj tsis yog peb qhov sib txawv tseem ceeb tau piav qhia tom qab hauv nplooj ntawv no.)
Yuav ua li cas thaum sau npe?
Ib strand ntawm RNA yog tsim thaum lub sij hawm tus txheej txheem ntawm transcription los ntawm ib tug strand ntawm DNA. … Cov RNA nucleotides uas yog ntxiv rau cov nucleotides ntawm DNA strand tau ntxiv rau RNA polymerase. RNA polymerase tsim RNA qab zib-phosphate qaum rau kev tsim ntawm RNA strand.
Lub npe ntawm nucleic acid tsim thaum lub sijhawm hloov pauv yog dab tsi?
Kev txhais lus yog tus txheej txheem uas cov ntaub ntawv hauv ib txoj hlua DNA tau theej rau hauv lub molecule tshiab ntawm messenger RNA (mRNA).
Nucleic acid txhais li cas?
Kev txhais lus yog catalyzed los ntawm ib tug loj enzyme hu ua ribosome, uas muaj cov proteins thiab ribosomal RNA (rRNA) Kev txhais lus kuj suav nrog qee cov RNA molecules hu ua hloov RNA (t-RNA) uas tuaj yeem khi rau peb lub basepair codons ntawm tus xa xov RNA (mRNA) thiab tseem nqa cov amino acid uas tsim nyog los ntawm codon.
4 kauj ruam ntawm kev txhais lus yog dab tsi?
plaub kauj ruam ntawm kev txhais lus yog:
- Kev ua kom lossis them nyiaj ntawm tRNA.
- Initiation - lees paub ntawm pib codon, khi ntawm ribosomal subunits rau mRNA thiab tsim kev pib ua haujlwm nrog Met-tRNA ntawm P site.
- Elongation - peptide daim ntawv cog lus tsim thiab loj hlob ntawm polypeptide saw.
Pom zoo:
Puas yog thaum lub sijhawm lossis lub sijhawm?
Feem ntau, Brits siv thaum thiab Asmeskas siv thaum. Qhov ntawd yog qhov sib txawv loj. Thaum siv los ua kev sib txuas lossis cov lus qhia, thaum thiab whilst hloov pauv tau: Tsis muaj ntau Stanley tuaj yeem ua thaum nws tos . Puas yog yav dhau los tense?
Thaum twg thiab qhov twg siv cov ntawv sau npe thaum sau cov qauv tshuaj?
Ib qho tshuaj formula yog ib qho kev qhia uas qhia cov ntsiab lus hauv ib qho kev sib txuas thiab cov txheeb ze ntawm cov ntsiab lus. Yog tias tsuas yog ib qho atom ntawm ib hom tshwj xeeb yog tam sim no, tsis muaj subscript siv. Rau atoms uas muaj ob lossis ntau dua ntawm ib hom tshwj xeeb ntawm atom tam sim no, ib daim ntawv sau npe sau tom qab lub cim rau lub atom Dab tsi yog cov ntawv sau npe siv rau hauv cov qauv tshuaj?
Puas yog sijhawm sijhawm lossis sijhawm sijhawm?
Raws lub npe qhov txawv ntawm sijhawm sijhawm thiab sijhawm sijhawm yog qhov sijhawm sijhawm yog lub sijhawm ua raws sijhawm thaum sijhawm sijhawm yog sijhawm sijhawm; qhov tseeb . Puas yog lub sijhawm sijhawm ib lo lus? adj. 1. Ua los yog tuaj txog raws li lub sijhawm teem tseg;
Lub sijhawm no lub sijhawm pangea tau tsim?
Pangaea tau sib sau ua ke tsuas yog ntawm kawg ntawm Paleozoic era, kwv yees li 250 lab xyoo dhau los. Nws pib tawg thaum lub sijhawm Jurassic ntawm Mesozoic era, txog 170 lab xyoo dhau los, tsim lub Atlantic thiab lwm cov dej hiav txwv bass .
Puas yog draupadi ntawm lub sijhawm thaum lub sijhawm vastraharan?
Draupadi yog nyob rau hauv nws lub caij ua poj niam thaumlub sijhawm ntawd - qhov teeb meem uas tau siv tam sim no los cuam tshuam Hinduism. Thiab qhov ntawd yog qhov laj thawj tseem ceeb rau nws tsis kam tuaj rau hauv tsev hais plaub. Cov poj niam cev xeeb tub yeej tsis nrog leej twg nyob hauv lub tebchaws no txij li thaum ub .
