Ribosomes yog pom 'dawb' hauv cytoplasmlossis khi rau endoplasmic reticulum (ER) los ua ER ntxhib. Nyob rau hauv ib tug mammalian cell yuav muaj li 10 lab ribosomes. Ob peb ribosomes tuaj yeem txuas rau tib lub mRNA strand, cov qauv no hu ua polysome. Ribosomes tsuas muaj nyob ib ntus xwb.
Puas ribosomes ua haujlwm hauv cytoplasm?
Ribosomes tuaj yeem pom ntab hauv cytoplasm lossis txuas rau endoplasmic reticulum. Lawv lub luag haujlwm tseem ceeb yog hloov cov cai caj ces rau hauv cov amino acid ib ntus thiab tsim cov protein polymers los ntawm cov amino acid monomers.
Yuav ua li cas ribosomes mus rau cytoplasm?
Nyob rau hauv lub nucleolus, tshiab ribosomal RNA ua ke nrog cov proteins los tsim cov subunits ntawm ribosome. Cov subunits tshiab tau tsim yog thauj tawm los ntawm lub qhov hws nuclearmus rau cytoplasm, qhov chaw lawv tuaj yeem ua lawv txoj haujlwm.
Puas cytoplasm muaj ribosomes?
Ribosomes yog pom hauv cytoplasm . Lawv muaj kwv yees li 15-20 nm nyob rau hauv txoj kab uas hla thiab muaj xws li ib tug me me (30S) thiab ib tug loj (50S) subunit. Kev koom tes ntawm subunits yuav tsum muaj Mg2+. Ribosomes yog tsim los ntawm 30% ribosomal proteins thiab 70% ribosomal RNA.
Hom ribosomes twg raug tshem tawm hauv cytoplasm?
Muaj ob qhov chaw cytoplasmic: Free ribosomes raug tshem tawm hauv cytosol. Cov kab ribosomes txuas nrogmus rau sab nraud ntawm endoplasmic reticulum. Dawb ribosomes ua cov proteins uas yuav siv rau hauv cytosol. Bound ribosomes ua cov proteins uas yuav xa mus rau lwm qhov.
