Video: Ribosomes ua dab tsi hauv lub cell prokaryotic?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Ribosomes yog me me spherical organelles uas ua proteins los ntawm kev koom nrog cov amino acids ua ke. Ntau cov ribosomes pom muaj pub dawb hauv cytosol, thaum lwm tus tau txuas rau qhov ntxhib endoplasmic reticulum. Lub hom phiaj ntawm ribosome yog txhais cov tub txib RNA (mRNA) rau cov protein nrog kev pab ntawm tRNA.
Xav txog qhov no, qhov txawv ntawm ribosomes hauv prokaryotes thiab eukaryotes yog dab tsi?
Lub ntsiab Qhov sib txawv ntawm prokaryotic thiab eukaryotic ribosomes yog tias prokaryotic ribosomes nyob rau hauv cov ntshav ib me,70s cov ribosomes hos cov eukaryotic ribosomes ntawm cov hlab ntsha loj, 80s cov ribosomes.
Tsis tas li ntawd, qhov loj npaum li cas ribosomes muaj nyob hauv lub cell prokaryotic? Ribosomes Loj Cov prokaryotic yog suav nrog 30s (Svedberg) subunit thiab 50s (Svedberg) subunit lub ntsiab lus 70s rau tag nrho cov organelle sib npaug rau qhov hnyav molecular ntawm 2.7 × 106 Daltons. Prokaryotic ribosomes yog hais txog 20 nm (200 Å) inch thiab yog ua los ntawm 35% ribosomal ua proteins thiab 65% rRNA.
Kuj Paub, Nucleoid ua dab tsi hauv lub cell prokaryotic?
Cov nucleoid cheeb tsam yog lub irregularly-zoo li seem ntawm a prokaryotic cell qhov twg DNA yog tsev. Nws lacks lub membrane uas yog pom nyob ib ncig ntawm lub nucleus ntawm eukaryotic hlwb . Ntxiv nrog rau DNA, lub nucleoid tej zaum kuj muaj RNA, proteins, thiab enzymes uas ua tau siv rau cellular txheej txheem.
Puas yog prokaryotic hlwb puas muaj ribosomes?
Ob leeg eukaryotes thiab prokaryotes muaj cov RNA loj / cov qauv protein hu ua cov ribosomes , uas tsim cov protein, tab sis cov cov ribosomes ntawm prokaryotes yog me dua cov eukaryotes. Hloov chaw, cov txheej txheem xws li oxidative phosphorylation thiab photosynthesis coj qhov chaw thoob plaws lub prokaryotic cell daim nyias nyias.
Pom zoo:
Dab tsi yog ribosomes hauv cell?
Kev ua haujlwm ntawm Ribosomes. Ribosomes yog cov qauv cell uas ua rau cov protein. Protein xav tau rau ntau lub xovtooj ntawm tes xws li kho kev puas tsuaj lossis tswj cov txheej txheem tshuaj. Ribosomes tuaj yeem pom nyob hauv lub cytoplasm lossis txuas rau endoplasmic reticulum. Proteins yog ib feem tseem ceeb ntawm txhua lub hlwb
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 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 qhov txawv ntawm cov hlwb prokaryotic thiab prokaryotic?
Prokaryotes yog cov kab mob uas tsim los ntawm cov hlwb uas tsis muaj cell nucleus los yog ib qho membrane-encased organelles. Eukaryotes yog cov kab mob uas tsim los ntawm cov hlwb uas muaj cov membrane-bound nucleus uas tuav cov khoom siv noob caj noob ces nrog rau cov kab mob membrane-bound organelles
Dab tsi yog cell membrane hauv prokaryotic cell?
Prokaryotes thiab eukaryotes yog ob hom cell uas muaj nyob. Tab sis, prokaryotes muaj qee cov organelles nrog rau cov cell membrane, kuj hu ua phospholipid bilayer. Cov cell membrane no kaw lub cell thiab tiv thaiv nws, tso cai rau hauv qee cov molecules raws li qhov xav tau ntawm tes