Cov txheej txheem:
Video: Dab tsi yog ob qho lus piav qhia vim li cas qee qhov RNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Dab tsi yog ob qho lus piav qhia vim li cas qee qhov RNA molecules raug txiav thiab spliced? ib qho: ua kom nws muaj peev xwm rau ib lub noob los tsim ntau hom sib txawv RNA . ob : ua kom nws muaj peev xwm hloov me me hauv DNA ib ntus kom muaj kev cuam tshuam loj hauv cov kab lus gene.
Tib neeg kuj nug, yuav ua li cas tsuas yog plaub lub hauv paus hauv RNA nqa cov lus qhia rau 20?
Cov noob caj noob ces yog nyeem peb tsab ntawv nyob rau ib lub sij hawm, kom txhua "lo lus" ntawm cov lus coded yog peb hauv paus ntev. uas yog to muab ntxiv rau ib polypeptide.
Ib sab saum toj no, puas yog RNA zoo li daim ntawv luam ntawm DNA? RNA yog zoo li daim ntawv pov thawj DNA ntu. Nws ua rau nws muaj peev xwm ua tau rau ib tus gene los tsim ntau tus lej RNA molecules. Dab tsi yog qhov tseem ceeb ntawm lub cell lub peev xwm luam ib ib DNA sequence rau RNA ? Feem ntau yog koom nrog hauv kev tsim cov protein.
Hais txog qhov no, hom RNA yog dab tsi?
Muaj 4 hom RNA, txhua tus encoded los ntawm nws tus kheej hom noob:
- mRNA - Neeg xa xov liaison RNA: encodes amino acid ib ntus ntawm polypeptide.
- tRNA - Hloov RNA: Nqa cov amino acids rau ribosomes thaum lub sijhawm txhais lus.
- rRNA - Ribosomal RNA: Nrog ribosomal proteins, ua rau cov ribosomes, cov organelles uas txhais cov mRNA.
Dab tsi yog cov yam ntxwv ntawm RNA?
RNA muaj ribose nucleotides (nitrogenous bases ntxiv rau ribose qab zib) txuas los ntawm phosphodiester bonds, tsim cov strands ntawm qhov sib txawv ntev. Cov nitrogenous hauv paus RNA yog adenine, guanine, cytosine, thiab uracil, uas hloov thymine hauv DNA.
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