2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov lus teb rau lo lus nug no yog qhov tseeb tias qee cov proteins compact chromosomal DNA rau hauv qhov chaw microscopic ntawm eukaryotic nucleus. Cov proteins no hu ua histones, thiab cov txiaj ntsig DNA-protein complex hu ua chromatin.
DNA tau compacted li cas?
DNA nruj nreem up kom haum rau hauv lub nucleus ntawm txhua lub cell. Raws li pom nyob rau hauv cov animation, ib DNA molecule qhwv ib ncig ntawm histone proteins los tsim nruj loops hu ua nucleosomes. Cov nucleosomes coil thiab pawg ua ke los tsim cov fibers hu ua chromatin.
nws hu li cas thaum DNA tau cog lus thiab koom ua ke?
Daim duab 5: Txhawm rau kom haum zoo nyob rau hauv lub cell, cov khoom ntev ntawm ob txoj hlua DNA tau nruj nreem ntim rau hauv cov qauv hu ua chromosomes. … Qhov tseeb tiag, cov txheej txheem ntim ntawm DNA tuaj yeem ua tau yooj yim thiab zoo li tau tswj hwm hauv cov hlwb. Chromatin packing kuj muaj cov txheej txheem ntxiv rau kev tswj cov noob qhia.
YPuas DNA hauv A chromosome?
Nyob rau hauv lub nucleus ntawm txhua lub cell, DNA molecule tau ntim rau hauv xov zoo li cov qauv hu ua chromosomes. Txhua chromosome yog tsimntawm DNA nruj nreem coiled ntau zaus nyob ib ncig ntawm cov proteins hu ua histones uas txhawb nqa nws cov qauv.
DNA hauv biology yog dab tsi?
A nucleosome yog ib feem ntawm DNA uas qhwv ib ncig a cores proteins. Nyob rau hauv lub nucleus, DNA tsim ib tug complex nrog proteins hu ua chromatin,uas tso cai rau DNA tau condensed rau hauv ib lub ntim me me. Thaum cov chromatin txuas ntxiv thiab saib hauv lub tshuab ntsuas, cov qauv zoo li cov hlaws dai ntawm ib txoj hlua.
Pom zoo:
Dab tsi yog lub hauv paus compacted?
Subgrade-qhov no yog cov av ib txwm muaj (lossis cov av txhim kho), feem ntau compacted. Subbase-qhov no yog txheej pob zeb saum toj ntawm subgrade. Base (los yog hauv paus chav kawm)-qhov no yog txheej txheej ntawm cov khoom nyob rau sab saum toj ntawm lub subbase thiab ncaj qha rau hauv qab ntawm lub slab.
Vim li cas kuv lub tshuab luam ntawv hais tias nws xav tau ntawv thaum nws muaj ntawv?
daim ntawv yog slick rau cov khoom. Daim ntawv yuav tsis koom nrog cov khoom noj khoom haus. … Lub tais ntawv tsis tau muab tso rau hauv cov khoom. Cov ntawv teeb tsa hauv lub tshuab luam ntawv tsis sib xws nrog cov ntawv ntim rau hauv daim ntawv tais.
Thaum rho tawm cov hlau cov ore yog ci yog tias nws yog?
Nyob rau hauv roasting, cov ore los yog ore concentrate yog kho nrog cua kub heev. Cov txheej txheem no feem ntau yog siv rau cov zaub mov sulfide. Thaum lub sij hawm ci, cov sulfide hloov mus rau an oxide, thiab sulfur yog tso tawm raws li sulfur dioxide, roj.
Vim li cas cov av compacted tseem ceeb?
Vim li cas Av Compaction tseem ceeb? Av compaction yog tsim nyog los ua kom cov kabmob muaj peev xwm thiab khov kho ntawm in-situ (natural state) lossis tshuaj hloov cov av. Compaction nce lub zog shear ntawm cov av los ntawm kev ntxiv kev sib txhuam los ntawm interlocking hais.
Thaum twg cov sediments yog cemented los yog compacted ua ke?
txheej txheem no hu ua compaction. Nyob rau tib lub sij hawm cov khoom ntawm sediment pib lo rau ib leeg - lawv yog cemented ua ke los ntawm av nplaum, los yog cov minerals xws li silica los yog calcite. Tom qab compaction thiab cementation cov sedimentary sequence tau hloov mus rau hauv cov pob zeb sedimentary.
