2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
DNA. Hauv DNA helix, lub hauv paus: adenine, cytosine, thymine thiab guanine yog txhua tus txuas nrog lawv cov hauv paus ntxiv los ntawm hydrogen bonding. Adenine ua ke nrog thymine nrog 2 hydrogen bonds. … Qhov sib txawv ntawm lub zog no yog vim qhov sib txawv ntawm tus lej ntawm hydrogen bonds.
Vim li cas cytosine thiab guanine muaj triple bonds?
Guanine thiab cytosine ua ib khub ntawm nitrogenous vim tias lawv muaj hydrogen daim ntawv cog lus pub dawb thiab hydrogen daim ntawv cog lus ua khub nrog ib leeg hauv qhov chaw. Guanine thiab cytosine tau hais kom ua tiav rau ib leeg.
Puas adenine tsim ob daim ntawv cog lus?
A purine (adenine lossis guanine) muaj ob lub nplhaib. Ib pyrimidine (cytosine los yog thymine) muaj ib lub nplhaib. Hauv DNA, purine yuav sib txuas nrog pyrimidine. Nyob ntawm tus qauv, nws yuav rau ob daim ntawv cog lus hydrogen nrog ib leeg lossis peb.
Dab tsi yog 2 qhov laj thawj vim li cas adenine khub nrog thymine thiab cytosine khub nrog guanine?
Nyob hauv DNA, adenine ib txwm ua khub nrog thyine thiab cytosine ib txwm ua khub nrog guanine. Cov khub no tshwm sim vim geometry ntawm lub hauv paus, s cia hydrogen bonds tsim tsuas yog ntawm "txoj cai" khub. Adenine thiab thymine yuav tsim ob daim ntawv cog lus hydrogen, thaum cytosine thiab guanine yuav tsim peb daim ntawv cog lus hydrogen.
Vim li cas adenine thiab thymine thiaj li muaj feem pua ?
Qhov no yog vim adenine yuavib txwm ua khub nrog thymine, yog li yuav muaj ntau npaum li thymine bases li adenine bases. Ua ke, adenine thiab thymine tsim 70% ntawm ntu. Qhov no txhais tau tias 30% ntawm ntu yog tsim los ntawm guanine-cytosine khub.
Pom zoo:
Nyob rau hauv daim ntawv cog lus cog lus cov pawnee hloov?
Kev cog lus Hauv kev cog lus, tus neeg txais nyiaj hloov pauv / tso nws cov khoom rau Pawnee raws li kev ruaj ntseg tiv thaiv tus nqi uas nws tau txais los ntawm Pawnee. Tus neeg txais nyiaj muaj lub luag haujlwm them tus nqi rov qab rau tus Pawnee thiab tus Pawnee muaj lub luag haujlwm rov qab cov khoom tom qab tus neeg txais nyiaj them tus nqi.
Puas yog daim ntawv cog lus tsis muaj tseeb ib yam li cov ntawv cog lus tsis muaj lawm?
Daim ntawv cog lus tsis muaj nuj nqis yog qhov kev pom zoo uas tsis muaj kev cai lij choj txhua yam vim muaj qee yam tsis xws luag. Nws suav tias tsis muaj thiab tsis muaj nyob txij thaum pib thiab tsis tuaj yeem pom zoo los ntawm txoj cai. Daim ntawv cog lus tsis zoo no yog qhov 'kev cog lus tsis muaj tseeb' vim tias 'kev cog lus' yuav tsum muaj txoj cai lij choj.
Puas yog daim ntawv cog lus yog daim ntawv cog lus siv tau?
Vim a daim ntawv cog lus tsis yog daim ntawv cog lus tseeb, kev lees paub ntawm kev sib nrig tsis tsim nyog, thiab lub tsev hais plaub yuav txiav txim siab yam tsis xav txog lub hom phiaj ntawm ob tog. Thaum ib tog foob rau kev puas tsuaj raws li daim ntawv cog lus, kev kho mob feem ntau yog rov qab los yog rov qab los raws li kev xav ntawm quantum meruit.
Puas yog daim ntawv sau npe daim ntawv cog lus?
HM Land Registry cov ntaub ntawv yog digital, yog li peb tsis khaws daim ntawv teev npe. Feem ntau, peb tsuas muaj daim ntawv cog lus thawj zaug thaum daim av lossis vaj tse tau sau npe thawj zaug, raws li peb xav tau lawv los npaj cov npe. … Tom qab ntawd koj tuaj yeem tau txais ib daim qauv ntawm koj daim ntawv ua haujlwm.
Puas yog daim ntawv cog lus tom qab kev cog lus hauv California?
Tsuav koj qhov kev pom zoo ua tiav California txoj cai lij choj, cov tsev hais plaub yuav txiav txim siab tias nws siv tau txawm tias koj tau sib yuav ntev npaum li cas. Qhov tseeb, kev cog lus tom qab yug me nyuam yog feem ntau ntawm cov niam txiv uas tau sib yuav tau ntau xyoo, raws li lawv nkag siab zoo dua qhov ntau npaum li cas txhua tog tau nce lossis poob.
