Video: Dab tsi organelle yog sib sau ua ke nyob rau hauv lub nucleolus ntawm lub nucleus?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub nucleolus yog lub subdomain nuclear uas sib sau ua ke ribosomal subunits hauv eukaryotic hlwb. Lub nucleolar organizer cheeb tsam ntawm chromosomes, uas muaj cov noob rau pre- ribosomal ribonucleic acid (rRNA), ua lub hauv paus rau cov qauv nucleolar.
Ib yam li ntawd ib tug yuav nug, dab tsi yog assembled nyob rau hauv lub nucleolus?
Cov nucleolus yog ib tug txawv qauv nyob rau hauv lub nucleus ntawm lub cell muaj li ntawm filamentous thiab granular khoom. Nws yog qhov chaw ntawm synthesis thiab ua ntawm ribosomal RNA thiab cov kev sib dhos ntawm no RNA nrog ribosomal proteins rau hauv ribosomal subunits.
Tsis tas li ntawd, puas yog cov chromosomes hauv cov nucleolus? Lub nucleus yog lub ntsiab organelle thaum lub nucleolus yog lub sub-organelle. Lub nucleus muaj DNA thaum lub nucleolus muaj RNA. 4. Lub nucleus muaj cov chromosomes thiab cellular week thaum lub RNA muaj lub fibrillar chaw zov me nyuam, tuab fibrillar chaw zov me nyuam, thiab cov granular tivthaiv.
Tsis tas li ntawd, cov nucleolus ua haujlwm li cas nrog lub nucleus?
Cov nucleolus yog ib tug qauv pom nyob rau hauv lub nucleus ntawm cov cell thiab nws tsim nyob ib ncig ntawm thaj tsam chromosomal hauv cov nucleus eukaryotic hlwb yog tsim los ntawm cov protein thiab ribonucleic acids. Nws lub luag haujlwm tseem ceeb yog sau cov ribosomal RNA (rRNA) thiab muab nws nrog cov proteins los tsim cov ribosomes tsis tiav.
Puas yog kev txhais lus tshwm sim hauv cov nucleolus?
Cov noob uas encode ribosomal proteins yog transcribed sab nraum lub nucleolus los ntawm RNA polymerase II, yielding mRNAs uas yog txhais ntawm cytoplasmic ribosomes. Cov ribosomal proteins ces thauj los ntawm cytoplasm mus rau lub nucleolus , qhov twg lawv tau sib sau ua ke nrog rRNAs los tsim cov khoom preribosomal.
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