Video: Dab tsi yog ribosomes tsim los ntawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Eukaryote cov ribosomes yog ua thiab sib dhos nyob rau hauv lub nucleolus. Ribosomal cov proteins nkag mus rau hauv nucleolus thiab ua ke nrog plaub rRNA strands los tsim ob ribosomal ua subunits (ib qho me me thiab ib qho loj) uas yuav ua kom tiav ribosome (saib daim duab 1).
Tsis tas li ntawd, ribosomes nyob qhov twg?
Ribosomes yog pom 'dawb' hauv cytoplasm lossis khi rau endoplasmic reticulum (ER) los tsim ER ntxhib. Nyob rau hauv ib tug mammalian cell yuav muaj li 10 lab cov ribosomes . Ob peb cov ribosomes tuaj yeem txuas rau tib lub mRNA strand, cov qauv no hu ua polysome.
Qhov thib ob, ua li cas cov nucleolus tsim ribosomes? Cov nucleolus ua rau ribosomal subunits los ntawm cov protein thiab ribosomal ua RNA, tseem hu ua rRNA. Nws mam li xa cov subunits tawm mus rau lwm lub cell uas lawv muab ua kom tiav cov ribosomes . Ribosomes ua cov protein; yog li ntawd, cov nucleolus plays lub luag haujlwm tseem ceeb hauv ua proteins nyob rau hauv lub cell.
Ib yam li ntawd, tib neeg nug, ribosomes ua haujlwm li cas?
Nrog rau mRNA muab cov lus qhia, lub ribosome txuas mus rau tRNA thiab rub tawm ib qho amino acid. Tom qab ntawd tRNA tso tawm rov qab rau hauv lub cell thiab txuas mus rau lwm cov amino acid. Cov ribosome tsim kom ntev amino acid (polypeptide) saw uas nws thiaj li yuav yog ib feem ntawm cov protein ntau.
Puas yog ribosomes hauv cov nroj tsuag?
Cog cell muaj cov ribosomes thiab lawv muaj cov proteins thiab ribosomal RNA. Cov cov ribosomes hauv a cog cell muaj nyob rau hauv lub cytoplasm, nto ntawm ntxhib endoplasmic reticulum , mitochondria thiab ntawm chloroplasts. Ribosomes tshwj xeeb vim lawv muaj nyob rau hauv ob qho tib si prokaryotes thiab eukaryotes.
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