Video: Puas yog rRNA ib yam khoom ntawm kev hloov pauv?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov khoom ntawm transcription yog RNA. Qhov RNA tuaj yeem yog mRNA, tRNA, rRNA , los yog lwm yam RNA (xws li uas ua rau miRNA, lncRNA, thiab lwm yam).
Yog li ntawd, puas transcription tsim rRNA?
rRNA ( Ribosomal RNA ) yog lub hauv paus ntsiab lus ntawm Ribosome, lub tshuab tsim cov protein ntawm tag nrho cov nyob hauv hlwb. Cov rRNA yog synthesized nyob rau hauv lub nucleolus. Bacterial 16S, 23S, thiab 5S rRNA genes feem ntau yog koom ua ke ua ke luam tawm ua haujlwm.
Tsis tas li ntawd, puas yog rRNA siv hauv kev sau lossis txhais lus? Ob leeg tRNA (hloov RNA) thiab rRNA ( ribosomalRNA ua ) yog cov khoom ntawm kev sau ntawv . Txawm li cas los xij, lawv tsis ua raws li tus qauv ntawm txhais lus . tRNA yog lub luag haujlwm rau nqa cov amino acid kom raug thaum lub sijhawm txhais lus . rRNA ua rau lub ribosome, uas yog lub luag haujlwm rau enzyme txhais lus.
Qhov thib ob, qhov khoom kawg ntawm kev sau ntawv yog dab tsi?
Dab tsi yog qhov End Product of Transcription . Cov kawg khoom ntawm transcription yog RNA, ib leeg-strandedmolecule ua los ntawm RNA nucleotides. Peb hom tseem ceeb ntawm RNAproduced nyob rau hauv lub kev sau ntawv yog mRNA, tRNA, andrRNA.
Dab tsi RNA siv hauv kev sau ntawv?
Ob leeg DNA thiab RNA yog nucleic acids, uas siv cov khub nucleotides ua ib hom lus ntxiv. Thaum kev sau ntawv , DNA sequence yog nyeem los ntawm ib RNA polymerase, uas tsim ib qho ntxiv, antiparallel RNA strand hu ua thawj cov ntawv sau tseg.
Pom zoo:
Vim li cas tom qab kev hloov pauv kev hloov pauv tseem ceeb?
Kev hloov pauv tom qab kev txhais lus (PTMs) xws li glycosylation thiab phosphorylation ua lub luag haujlwm tseem ceeb ntawm kev ua haujlwm ntawm hemostatic proteins thiab tseem ceeb heev hauv kev teeb tsa kab mob. Xws li theem nrab hloov pauv rau cov proteins hemostatic muaj ntau yam cuam tshuam rau lawv lub peev xwm los cuam tshuam nrog lwm cov proteins
Dab tsi yog qhov txawv ntawm ib puag ncig kev hloov pauv thiab kev hloov pauv qub txeeg qub teg?
Qhov sib txawv ntawm cov yam ntxwv ntawm cov tib neeg ntawm tib hom yog hu ua variation. Qhov no yog inherited variation. Qee qhov kev hloov pauv yog qhov tshwm sim ntawm qhov sib txawv ntawm ib puag ncig, lossis ib tus neeg ua dab tsi. Qhov no yog hu ua environmental variation
Dab tsi yog qhov kev hloov pauv ntawm cov khoom uas txav ntawm qhov chaw mus rau qhov chaw ntawm - 12 m?
Kev piav qhia: Qhov kev txav ntawm ib qho khoom txav ntawm qhov chaw mus rau qhov chaw ntawm − 12 m yog 12 meters. Qhov kev ncua deb ntawm lub hauv paus chiv keeb mus rau qhov siab tshaj plaws txoj hauj lwm yog hu ua displacement ntawm ib yam khoom. Qhov siab tshaj plaws kev hloov pauv ntawm cov khoom nyob rau hauv ib nthwv dej yog hu ua crest thiab qhov tsawg kawg nkaus hloov pauv yog hu ua trough
Thaum ib qho kev sib cais ua rau muaj kev hloov pauv hloov pauv ntawm lub ntiaj teb nce ntxiv?
Txij li thaum lub kaw lus raug cais tawm, tsis muaj cua sov tuaj yeem khiav tawm (tus txheej txheem yog li adiabatic), yog li thaum lub zog ntws tawm hauv lub cev, qhov entropy ntawm qhov system nce, piv txwv li Δ Ssys> 0. Yog li ntawd, lub entropy ntawm lub system yuav tsum tau nce rau ib tug spontaneous txheej txheem nyob rau hauv no cais system
Peb qhov laj thawj tseem ceeb ntawm kev hloov pauv hloov pauv yog dab tsi?
Allele frequencies nyob rau hauv ib tug pej xeem yuav hloov vim plaub lub hauv paus zog ntawm evolution: Natural Selection, Genetic Drift, Mutations thiab Gene Flow. Kev hloov pauv yog qhov kawg ntawm cov alleles tshiab hauv cov noob caj noob ces. Ob ntawm cov txheej txheem tseem ceeb tshaj plaws ntawm kev hloov pauv hloov pauv yog: Natural Selection thiab Genetic Drift