Video: Dab tsi yog cov ntsiab lus ntawm Extrachromosomal?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Extrachromosomal Lub voj voog DNA (eccDNA) muaj nyob rau hauv tag nrho cov hlwb eukaryotic, feem ntau yog muab los ntawm genomic DNA, thiab muaj cov txheej txheem rov ua dua ntawm DNA pom nyob rau hauv ob qho tib si coding thiab non-coding cheeb tsam ntawm chromosomes. EccDNA tuaj yeem sib txawv me me los ntawm tsawg dua 2000 puag khub mus rau ntau dua 20,000 lub hauv paus khub.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog extrachromosomal genetic khoom ntawm cov kab mob?
Extrachromosomal DNA hauv Kab mob . Los ntawm Werner Goebel [*I. Ntxiv nrog rau chromosomal DNA nqa cov cov ntaub ntawv caj ces ntawm cell, ntau kab mob cov hlwb muaj me me ncig DNA yam uas hu ua plasmids lossis episomes. Cov no caj ces cov ntsiab lus endow lub cell nrog ntxiv biochemical peev xwm.
Ib yam li ntawd, DNA puas pom hauv cytoplasm? Deoxyribonucleic acid (nrog rau DNA ) yog pom Feem ntau nyob rau hauv lub nucleus ntawm lub cell, thaum Ribonucleic Acid (RNA) yog pom feem ntau nyob rau hauv lub cytoplasm ntawm lub cell txawm hais tias nws yog feem ntau synthesized nyob rau hauv lub nucleus.
Qhov thib ob, Extrachromosomal inheritance yog dab tsi?
Ib tug tsis-mendelian qauv ntawm qub txeeg qub teg tswj hwm los ntawm DNA tam sim no hauv cytoplasm yog hu ua extrachromosomal keeb kwm los yog cytoplasmic qub txeeg qub teg ” DNA yog cov khoom siv caj ces ntawm peb thiab teem rau ntawm chromosomes. Hom no qub txeeg qub teg npe as extrachromosomal keeb kwm los yog cytoplasmic qub txeeg qub teg.
Dab tsi yog non chromosomal DNA?
Kev kho mob txhais rau tsis yog - chromosomal Ib tug threadlike linear strand ntawm DNA thiab txuam nrog cov proteins nyob rau hauv lub nucleus ntawm cov tsiaj thiab cov nroj tsuag hlwb uas nqa cov noob thiab kev ua haujlwm hauv kev xa cov ntaub ntawv keeb kwm yav dhau los.
Pom zoo:
Dab tsi yog lub ntsiab lus ntawm ib pab pawg ntawm cov lus teev sijhawm?
Nyob rau hauv chemistry, ib pab pawg (tseem hu ua tsev neeg) yog ib kem ntawm cov ntsiab lus nyob rau hauv lub sij hawm lub sij hawm ntawm cov tshuaj. Muaj 18 pawg lej nyob rau hauv daim ntawv teev sijhawm; cov kab f-block (nruab nrab ntawm pawg 3 thiab 4) tsis suav nrog
Lub ntsiab lus ntawm lub hauv paus lo lus meter nyob rau hauv lo lus tus pas ntsuas kub yog dab tsi?
Lub hauv paus chiv keeb ntawm lo lus 'Thermometer' Qhov thib ob ntawm lo lus, 'meter', los ntawm Fabkis -mètre (uas muaj nws cov hauv paus hauv lub post-classical Latin: -meter, -metrumand lub ancient Greek, -Μέτρο ν, lossis metron, uas txhais tau tias ntsuas qee yam, xws li qhov ntev, qhov hnyav, lossis dav)
Dab tsi yog txhais los ntawm lo lus inorganic hauv lub ntsiab lus ntawm cov ntxhia?
Ib txwm tshwm sim, homogeneous inorganic khoom muaj cov tshuaj muaj pes tsawg leeg thiab cov yam ntxwv crystalline qauv, xim, thiab hardness. Ib qho khoom siv tsis zoo, xws li calcium, hlau, potassium, sodium, lossis zinc, uas yog qhov tseem ceeb rau kev noj haus ntawm tib neeg, tsiaj txhu, thiab nroj tsuag
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces
Vim li cas cov ntsiab lus thiab cov ntsiab lus yog cov tshuaj ntshiab?
Elements thiab compounds yog ob qho tib si piv txwv ntawm cov khoom ntshiab. Ib yam khoom uas tuaj yeem tawg mus rau hauv cov tshuaj lom neeg yooj yim dua (vim tias nws muaj ntau dua ib qho) yog ib qho khoom sib xyaw. Piv txwv li, dej yog acompound tsim los ntawm cov ntsiab lus hydrogen thiaboxygen