Qhov sib txawv tseem ceeb ntawm centriole thiab centromere nyob ntawm nws txoj haujlwm. Centrioles koom nrog hauv kev sib txuas thiab kev teeb tsa ntawm spindle fibers whereas centromeres muab ib qho chaw ntawm kev txuas mus rau spindle fibers.
Cell division yog ib qho tseem ceeb hauv cov ntsiab lus ntawm kev ua neej txuas ntxiv mus. Nws ua rau cov kab mob loj hlob thiab tswj cov haujlwm tseem ceeb hauv lub cev. Cell faib yog ib txoj kev nyuaj uas muaj ntau hom qauv thiab organelles nyob rau hauv lub cell. Raws li txoj cai, centriole thiab centromere yog cov qauv zoo sib xws. Lub centriole yog ib qho organelle thaum lub centromere yog thaj tsam ntawm chromosome. Ob qho qauv tseem ceeb rau kev faib tawm ntawm tes thiab nws txoj kev loj hlob.
Centriole yog dab tsi?
Centriole yog ib qho me me cylindrical organelle tam sim no nyob rau hauv feem ntau eukaryotic hlwb. Tsis tas li ntawd, lawv muaj nyob rau hauv lwm hom flagellated hlwb. Tsis tas li ntawd, centrioles muaj tubulin protein ua lawv cov protein tseem ceeb. Cov qauv cylindrical ntawm centriole suav nrog ntau pawg ntawm microtubules uas nyob hauv 9 + 3 qauv. Thaum ob lub centrioles teem rau ib leeg, nws tsim ib lub centrosome. Qhov no centrosome ua haujlwm raws li qhov chaw tseem ceeb ntawm microtubule kev npaj, thiab nws tswj kev loj hlob ntawm lub voj voog ntawm tes. Thaum lub sijhawm faib ntawm tes, centrioles ua lub luag haujlwm tseem ceeb los ntawm kev txiav txim siab lub dav hlau uas qhov kev faib tawm nuclear tshwm sim hauv lub cell.
Daim duab 01: Centriole
Tsis tas li ntawd, centrosomes tsim spindle fibers los txuas nrog cov centromeres ntawm chromosomes. Yog li, lub luag haujlwm tseem ceeb ntawm centrioles yog npaj cov spindle fibers (spindle) thaum lub sij hawm mitosis thiab meiosis (cell division). Txawm hais tias centrioles muaj nyob rau hauv feem ntau ntawm cov tsiaj hlwb, lawv tsis tuaj nyob rau hauv conifers, flowering nroj tsuag thiab feem ntau hom fungi.
Centromere yog dab tsi?
Centromere yog cov qauv muaj nyob hauv chromosome uas txuas ob chromatids. Nws yog ib qho pom ntawm constriction hauv chromosome. Centromere muaj rov ua ntu zus ntawm DNA thiab cov proteins tshwj xeeb. Cov proteins no tsim cov qauv zoo li disk hu ua kinetochore ntawm lub centromere. Kinetochore koom nrog hauv xov tooj ntawm tes taw qhia rau kev loj hlob ntawm lub voj voog ntawm tes, thiab nws ua haujlwm raws li qhov chaw txuas tseem ceeb rau spindle microtubules.
Daim duab 02: Centromere
Centromeres yog ob hom uas yog, lub regional centromeres thiab point centromeres. Point centromeres tsim ib txoj kab ncaj nraim ntawm kev txuas rau ib chromosome thiab khi rau cov protein sib txawv. Cov proteins no paub txog cov txiaj ntsig DNA zoo heev. Tab sis cov chromosomes hauv cheeb tsam tsim muaj ntau yam txuas rau ib chromosome. Regional centromeres muaj ntau dua nyob rau hauv cov hlwb ntawm cov kab mob es tsis yog point centromeres.
Dab tsi yog qhov Zoo sib xws ntawm Centriole thiab Centromere?
- Centriole thiab centromere yog cov qauv tseem ceeb rau kev faib cell.
- Ob leeg nyob hauv lub cell.
Qhov txawv ntawm Centriole thiab Centromere yog dab tsi?
Centriole yog ib lub cell organelle thaum centromere yog thaj tsam ntawm chromosome. Qhov no yog qhov sib txawv tseem ceeb ntawm centriole thiab centromere. Tsis tas li ntawd, centrioles tsim spindle fibers, thiab centromeres muab qhov chaw txuas rau cov spindle fibers thaum lub sijhawm sib faib ntawm tes. Yog li, nws yog lwm qhov sib txawv ntawm centriole thiab centromere. Ntxiv mus, centriole thiab centromere txawv ntawm ib leeg ntawm kev pleev ib yam nkaus. Yog li, qhov sib txawv ntawm centriole thiab centromere tsim yog tias cov centrioles yog tsim los ntawm microtubulin proteins thaum centromeres yog ua los ntawm heterochromatin.
Cov lus qhia hauv qab no ntawm qhov sib txawv ntawm centriole thiab centromere qhia ntau cov ntaub ntawv ntawm qhov sib txawv.
Summary – Centriole vs Centromere
Cell faib yog ib qho tseem ceeb rau kev ua neej txuas ntxiv mus. Qee cov qauv xws li centrioles thiab centromeres yog qhov tseem ceeb rau kev faib cell. Centrioles yog me me cylindrical organelles ua los ntawm tubulin protein. Lawv muaj nyob rau hauv feem ntau eukaryotic hlwb xav tau nyob rau hauv cov nroj tsuag siab dua thiab feem ntau ntawm cov fungi. Tsis tas li ntawd, microtubules ntawm centrioles yog teem rau hauv ib qho tshwj xeeb 9 + 3 qauv. Ntawm qhov tod tes, centromere yog cov qauv muaj nyob rau hauv ib chromosome uas txuas ob chromatids ua ke. Lawv yog ob hom, point centromeres thiab regional centromeres. Yog li, qhov no qhia txog qhov sib txawv ntawm centriole thiab centromere.
