Video: Lub ribosome ua dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum lub cell xav tau ua proteins, nws nrhiav cov ribosomes . Ribosomes yog cov protein builders los yog protein synthesizers ntawm tes. Lawv yog zoo li cov neeg tsim kho uas txuas ib qho amino acid ib zaug thiab tsim cov saw ntev.
Nyob rau hauv tas li ntawd, dab tsi proteins ua ribosomes?
Ribosomes yog complexes ntawm rRNA molecules thiab cov proteins , thiab lawv ua tau yuav pom nyob rau hauv electron micrographs ntawm cell. Hauv lub ribosome , rRNA molecules coj cov kauj ruam catalytic ntawm protein ntau synthesis - lub stitching ua ke ntawm amino acids rau ua a protein ntau molecule.
Kuj Paub, ribosomes ua los ntawm dab tsi thiab lawv ua dab tsi? Ribosomes Loj Ribosomes suav nrog ob subunits uas tsim nyog tsim thiab ua haujlwm ua ib qho los txhais cov mRNA rau hauv cov saw hlau polypeptide ntawm cov protein synthesis. Vim lub fact tias lawv yog ua los ntawm ob subunits ntawm qhov sib txawv, lawv yog me ntsis ntev nyob rau hauv lub pob khawm dua nyob rau hauv txoj kab uas hla.
Ib sab saum toj no, ribosomes ua li cas?
A ribosome yog ua tawm ntawm RNA thiab proteins, thiab txhua ribosome muaj ob qhov sib cais RNA-protein complexes, hu ua cov subunits me thiab loj. Hauv eukaryotes, cov ribosomes tau txais lawv cov kev txiav txim rau cov protein synthesis los ntawm cov nucleus, qhov chaw ntawm DNA (genes) tau sau los ua tus xa xov RNAs (mRNAs).
Ob hom ribosomes yog dab tsi?
Muaj ob hom ribosomes , dawb thiab ruaj (tseem hu ua membrane bound). Lawv zoo ib yam nyob rau hauv cov qauv tab sis txawv nyob rau hauv qhov chaw nyob rau hauv lub cell. Dawb cov ribosomes nyob rau hauv lub cytosol thiab muaj peev xwm txav mus thoob plaws hauv lub cell, whereas tsau cov ribosomes yog txuas nrog rER.
Pom zoo:
Dab tsi yog qhov chaw thiab P site ntawm ribosome?
Qhov chaw A yog qhov chaw nkag rau aminoacyl tRNA (tshwj tsis yog thawj aminoacyl tRNA, uas nkag mus rau ntawm P site). P site yog qhov chaw peptidyl tRNA tsim nyob rau hauv ribosome. Thiab E qhov chaw uas yog qhov chaw tawm ntawm tam sim no tsis muaj nqi tRNA tom qab nws muab nws cov amino acid rau cov saw peptide loj hlob
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Dab tsi yog tsib lub hauv paus Circuit Court Cheebtsam lawv lub tsev yog dab tsi?
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Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej
Dab tsi yog ribosome synthesis?
Synthesis. Lub synthesis ntawm ribosomes nws tus kheej yog ib tug complex txheej txheem, yuav tsum tau sib koom tes tso zis los ntawm kaum ob ntawm cov noob encoding ribosomal proteins thiab rRNAs. Thaum sib sau ua ke, ze li ntawm tag nrho cov ribosomal subunits raug xa tawm ntawm lub nucleus thiab rov qab mus rau hauv cytoplasm rau cov kauj ruam kawg ntawm kev sib dhos