2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Heterochromatin yog dab tsi? Cov kws tshawb fawb yav dhau los tau pom heterochromatin ua "cov noob caj noob ces" nrog rau kev ua haujlwm lom me me (Pardue thiab Hennig 1990). Intriguingly, kev hloov pauv cuam tshuam rau heterochromatin tsim ntawm centromeres kawg ua rau muaj qhov tsis xws luag hauv chromosome segregation, yog li ua rau genome instability.
Qhov tshwm sim ntawm kev tsim ntawm heterochromatin rau lub cell yog dab tsi?
Qhov tshwm sim ntawm heterochromatin yog dab tsi? Txawm hais tias cov qauv chromatin ntawm interphase thiab mitotic chromosomes yog compact heev, DNA-binding proteins thiab protein complexes yuav tsum tau nkag mus rau DNA molecule. … Txhua tus tetramers muaj ob lub subunits ntawm cov proteins histone.
Qhov tshwm sim ntawm heterochromatin tsim noob caj noob ces yog dab tsi?
Thaum lub ntim heterochromatin kis thoob plaws heterochromatin / euchromatin ciam teb, nws ua rau transcriptional ntsiag to hauv tus qauv stochastic. … Heterochromatin protein HP1a khi H3K9me2/3 thiab cuam tshuam nrog SU(VAR)3-9, tsim kom muaj lub cim xeeb tseem ceeb.
Kev ua haujlwm ntawm heterochromatin yog dab tsi?
Heterochromatin tau cuam tshuam nrog ntau lub luag haujlwm, los ntawm kev tswj hwm noob mus rau kev tiv thaiv chromosome kev ncaj ncees; Qee lub luag haujlwm no tuaj yeem raug ntaus nqi los ntawm cov ntim ntom ntom ntawm DNA, uas ua rau nws tsis tshua nkag mus rau cov khoom muaj protein ntau uas feem ntau khi. DNA lossis nws cov yam ntxwv cuam tshuam.
Yuav ua li cas heterochromatin tswj cov noob qhia?
Heterochromatin yam tseem ceeb kuj kho cov kev sib cuam tshuam ntev ntawm kev ywj pheej ntawm CTCF thiab cohesin, muab cov txheej txheem ntawm chromatin folding uas tswj cov noob qhia.
Pom zoo:
Dab tsi ntawm qhov tshwm sim hauv qab no tau sim ua pov thawj los ntawm?
The Meselson thiab Stahl kev sim yog qhov kev sim ua pov thawj tias DNA rov ua dua yog ib nrab kev saib xyuas ib nrab kev saib xyuas Semiconservative replication piav qhia lub tshuab ntawm DNA rov ua dua hauv txhua lub hlwb paub. … Cov txheej txheem no hu ua semi-conservative replication vim hais tias ob daim ntawv luam ntawm tus thawj DNA molecule raug tsim.
Puas yog cov dab dab dab dab dab dab dab dab dab dab dab dab?
Myth: Ib tug dab tshos tsis yog neeg ncaj ncees yog tiasnws haum yog. Fact: Tu siab, qhov no yog ib lo lus tsis tseeb uas tau raug perpetuated los ntawm aversive trainers. Txawm hais tias haum rau lub caj dab kom zoo khawb rau hauv cov tawv nqaij rhiab nyob ib ncig ntawm lub caj dab, uas ua rau muaj kev puas tsuaj loj rau cov thyroid, esophagus, thiab trachea.
Dab tsi ntawm cov hauv qab no yog qhov tshwm sim ntawm kev sib ntaus sib tua ntawm lub pas dej brandywine?
Cov txiaj ntsig ntawm Kev Sib Tw ntawm Brandywine Creek yog dab tsi? Washington tsuas yog sim ncua kev ntes Philadelphia kom nws ua tiav li no. Cov tub rog Asmeskas tsis tau poob siab ntau thiab lawv tau khiav tawm ntawm British. Washington tseem tuaj yeem kawm los ntawm nws qhov yuam kev ntawm kev tso nws txoj cai sab xis qhib.
Thaum qhov no yog qhov tshwm sim uas tshwm sim?
Lub hauv paus ntsiab lus ntawm kev mob Nrog qhov tshwm sim (uppada) ntawm qhov no, qhov tshwm sim. Thaum tsis muaj qhov no, qhov ntawd tsis tuaj. Nrog lub cessation (nirodha) ntawm no, uas ceases. - Samyutta Nikaya 12.61. Thaum qhov no yog qhov tshwm sim uas tshwm sim qhov tshwm sim uas tshwm sim thaum qhov no tsis yog qhov tsis yog qhov kev txiav txim siab tsis piav qhia?
Yuav ua li cas txiav txim siab seb qhov kev tshwm sim yog tshwm sim los yog tsis ua raws li txoj cai?
Kev sib xyaw ua lej ntawm kev hloov pauv enthalpy thiab hloov pauv hloov pauv tso cai rau kev hloov pauv ntawm lub zog dawb los suav. A tawm tsam nrog tus nqi tsis zoo rau ΔG tso tawm lub zog dawb thiab yog li nws tus kheej. Cov tshuaj tiv thaiv nrog qhov zoo ΔG yog tsis ua raws li kev xav thiab yuav tsis nyiam cov khoom.
