Video: Nws tau kwv yees ntev npaum li cas los txiav txim siab tib neeg genome?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Txij li xyoo 1990, cov kws tshawb fawb thoob plaws ntiaj teb hauv tsev kawm qib siab thiab tsoomfwv cov chaw sim, muaj tau koom nrog kev mob siab rau nyeem tag nrho peb billion As, Ts, Gs, thiab Cs ntawm tib neeg DNA . Lawv kwv yees nws yuav coj yam tsawg kawg yog 15 xyoo.
Tsis tas li ntawd, dab tsi yog siv los txiav txim siab tib neeg genome?
HGP cov kws tshawb fawb siv ob peb txoj kev mus rau txiav txim siab tib neeg genome : Lawv tau kawm qhov kev txiav txim, lossis ib ntus, ntawm ntau dua 3 billion hauv paus hauv tib neeg DNA. Lawv ua daim ntawv qhia qhia qhov chaw ntawm cov noob ntawm peb cov chromosomes - tsis muaj haujlwm yooj yim, muab 20, 500 cov noob hauv ib qho tib neeg genome.
Tom qab ntawd, lo lus nug yog, leej twg tau txais txiaj ntsig los ua thawj tus ua tiav daim duab qhia ntawm tib neeg genome? Pib txij lub Kaum Hli 1, 1990 thiab ua tiav lub Plaub Hlis 2003, HGP tau muab peb lub peev xwm, rau ua ntej lub sij hawm, nyeem xwm qhov ua tiav genetic blueprint rau lub tsev a tib neeg.
Raws li, ntau npaum li cas ntawm peb DNA tau raug txiav txim?
Cov tib neeg genome muaj nyob ib ncig ntawm 20,000 genes, uas yog, tus stretches ntawm DNA uas encode proteins. Tab sis cov noob no tsuas yog kwv yees li 1.2 feem pua tus tag nrho genome. Cov lwm 98.8 feem pua yog hu ua noncoding DNA.
Peb paub ntau npaum li cas txog tib neeg genome?
Cov tib neeg genome Muaj kwv yees li 3 billion ntawm cov khub hauv paus, uas nyob hauv 23 khub ntawm chromosomes hauv lub nucleus ntawm tag nrho peb cov hlwb. Txhua chromosome muaj ntau pua mus rau txhiab tus noob, uas muaj cov lus qhia ua cov protein.
Pom zoo:
Nws siv sijhawm ntev npaum li cas los ua kom tib neeg genome 2018?
Teb Chaws Keeb Kwm: Nws siv sijhawm ntev npaum li cas los ua kom tib neeg genome niaj hnub no? Sequencing thawj tib neeg genome raug nqi txog $ 1 nphom thiab siv 13 xyoo ua kom tiav; hnub no nws raug nqi li ntawm $3,000 txog $5000 thiab siv sijhawm li ib mus rau ob hnub xwb
Yuav ua li cas koj txiav txim siab npaum li cas ntawm cov kua qaub uas yuav tsum tau neutralize lub hauv paus?
Kev daws qhov teeb meem Acid-Base Neutralization Kauj Ruam 1: Muab xam cov moles ntawm OH-. Molarity = moles / ntim. moles = Molarity x Volume. moles OH- = 0.02 M/100 milliliters. Kauj ruam 2: Xam qhov ntim ntawm HCl xav tau. Molarity = moles / ntim. Volume = moles/molarity. Volume = moles H+/0.075 Molarity
Ntev npaum li cas cov ntaub ntawv siv los txiav txim siab huab cua?
Ib ob 30-xyoo lub sij hawm los yog ntev dua yuav siv tau. Kev tsom xam cov qauv siv cov ntaub ntawv luv dua 30 xyoo tsis tshua muaj feem cuam tshuam vim tias qhov xwm txheej ib txwm muaj feem ntau txhais tau peb xyoo lawm
Avery thiab nws pab pawg tau txiav txim siab li cas molecule tseem ceeb tshaj plaws rau kev hloov pauv?
Qhia luv luv hais tias Avery thiab nws pab pawg tau txiav txim siab tias qhov twg yog qhov tseem ceeb tshaj plaws rau kev hloov pauv. Avery thiab nws pab pawg tau siv ob lub enzymes sib txawv ntawm cov kab mob tua hluav taws kub. Ib qho rhuav tshem DNA, lwm qhov rhuav tshem txhua yam tab sis. Lawv pom tias kev hloov pauv tseem tshwm sim thaum DNA nyob
Yuav ua li cas koj txiav txim siab uas yog tus nqi txiav txim kauj ruam?
Tus nqi txiav txim siab kauj ruam yog kauj ruam qeeb tshaj plaws ntawm cov tshuaj tiv thaiv tshuaj uas txiav txim siab qhov nrawm (tus nqi) uas tag nrho cov tshuaj tiv thaiv ua tiav. Teb Tus nqi txiav txim kauj ruam yog kauj ruam thib ob vim nws yog kauj ruam qeeb. 2NO + 2H2 → N2 + 2H2O. Cov intermediates hauv cov tshuaj tiv thaiv no yog N2O2 thiab N2O