Video: Ib co piv txwv ntawm RNA yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov ntaub ntawv ntawm RNA suav nrog tus xa xov RNA (mRNA), hloov RNA (tRNA), thiab ribosomal RNA (rRNA).
Ntxiv rau qhov no, piv txwv li RNA yog dab tsi?
Ib piv txwv ntawm RNA yog 'messenger RNA '. Qhov no yog synthesized nyob rau hauv lub nucleus siv DNA ua tus qauv. Qhov no tawm hauv lub nucleus los ntawm qhov pores thiab mus rau txheej txheem txhais lus los ua cov protein. Lwm tus piv txwv yog Transfer RNA , tRNA.
Ib tug kuj yuav nug, dab tsi yog hom RNA piav qhia? Peb qhov tseem ceeb hom RNA molecules yog tub txib RNA , hloov RNA thiab ribosomal RNA . Neeg xa xov liaison RNA (mRNA) ua lub luag haujlwm tseem ceeb hauv kev hloov pauv ntawm DNA. Kev hloov pauv yog cov txheej txheem hauv kev tsim cov protein uas suav nrog kev luam cov ntaub ntawv caj ces muaj nyob hauv DNA rau hauv ib qho RNA lus.
Ib tug kuj yuav nug, dab tsi yog piv txwv ntawm DNA thiab RNA?
Ob piv txwv ntawm nucleic acids suav nrog deoxyribonucleic acid (zoo dua hu ua DNA ) thiab ribonucleic acid (zoo dua lub npe hu ua RNA ). Cov molecules no yog tsim los ntawm ntev strands ntawm nucleotides tuav ua ke los ntawm covalent bonds. Nucleic acids tuaj yeem pom nyob rau hauv lub nucleus thiab cytoplasm ntawm peb cov hlwb.
3 hom RNA yog dab tsi thiab lawv ua li cas?
Peb loj hom RNA yog mRNA, los yog messenger RNA , uas yog cov ntawv luam ib ntus ntawm cov ntaub ntawv pom hauv DNA; rRNA, los yog ribosomal RNA , uas ua haujlwm raws li cov txheej txheem ntawm cov qauv tsim cov protein hu ua ribosomes; thiab thaum kawg, tRNA, lossis hloov RNA , uas ferry amino acids rau ribosome yuav tsum tau sib sau ua ke
Pom zoo:
Dab tsi yog qhov sib piv thiab piv txwv?
Inverse proportion. Inverse proportions tshwm sim thaum ib tus nqi nce thiab qhov txo qis. Piv txwv li, ntau tus neeg ua haujlwm ntawm txoj haujlwm yuav txo lub sijhawm los ua kom tiav cov haujlwm. Lawv yog inversely proportional
Thaum lub ntim ntawm ib qho piv txwv ntawm cov pa roj yog txo lub siab ntawm cov qauv ntawm cov pa roj?
Kev txo qis Cov pa roj sib xyaw txoj cai hais tias lub siab ntawm cov pa roj yog inversely cuam tshuam nrog lub ntim thiab ncaj qha ntsig txog qhov kub thiab txias. Yog tias qhov kub thiab txias yog nyob tas li, qhov sib npaug raug txo rau Boyle txoj cai. Yog li ntawd, yog tias koj txo qhov siab ntawm cov roj av tas li, nws qhov ntim yuav nce ntxiv
Dab tsi yog txhais los ntawm lub sij hawm dissociation thiab dab tsi yog ib qho piv txwv ntawm cov khoom uas dissociates?
Dissociation, nyob rau hauv chemistry, sib cais ntawm ib yam khoom mus rau hauv atoms los yog ions. Thermal dissociation tshwm sim ntawm qhov kub thiab txias. Piv txwv li, hydrogen molecules (H 2) dissociate rau hauv atoms (H) ntawm kub heev; ntawm 5,000 ° K txog 95% ntawm cov molecules hauv cov qauv ntawm hydrogen yog dissociated rau hauv atoms
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 qhov txawv ntawm microevolution thiab macroevolution Dab tsi yog qee qhov piv txwv ntawm txhua tus?
Microevolution vs. Macroevolution. Piv txwv ntawm cov kev hloov microevolutionary no yuav suav nrog kev hloov ntawm hom xim lossis loj. Macroevolution, piv txwv li, yog siv los hais txog kev hloov pauv ntawm cov kab mob uas tseem ceeb txaus uas, dhau sijhawm, cov kab mob tshiab yuav raug suav tias yog hom tshiab nkaus xwb