Video: Hydrogen bonds yog dab tsi thiab lawv tseem ceeb hauv lub cev li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hydrogen bonding yog qhov tseem ceeb hauv ntau cov txheej txheem tshuaj. Hydrogen bonding yog lub luag haujlwm rau dej cov kuab tshuaj tshwj xeeb. Hydrogen bonds tuav cov hlua txuas ntxiv ntawm DNA ua ke, thiab lawv yog lub luag haujlwm rau kev txiav txim siab peb-seem qauv ntawm folded cov proteins suav nrog cov enzymes thiab cov tshuaj tiv thaiv.
Ib yam li ntawd, hydrogen bonds yog dab tsi thiab lawv tseem ceeb npaum li cas hauv lub cev quizlet?
A hydrogen daim ntawv cog lus yog ib qho kev sib cog lus tsis muaj zog ntawm a hydrogen atom thiab atom ntawm oxygen los yog nitrogen ntawm molecules los yog txawv cheeb tsam ntawm ib tug loj heev molecule. Lawv ua rau DNA khaws nws cov qauv helix ob npaug thiab pab txhawb rau folding ntawm cov proteins.
Qhov thib ob, yuav ua li cas thiaj li tsis muaj hydrogen bonding? Hydrogen bonds ua kom qhov txo qis ntawm qhov kub siab tshaj plaws hauv cov dej loj. Txawm li cas los xij, tsis muaj hydrogen bonds , dej hauv dej hiav txwv thiab pas dej yuav pib sai sai vim qhov poob ntawm qhov kub npau npau - ua rau muaj teeb meem loj rau lub neej hauv ntiaj teb.
Tom qab ntawd, lo lus nug yog, hydrogen bonds siv li cas hauv lub neej txhua hnub?
Txhua hnub Hydrogen Bonds . Hydrogen bonding tshwm sim feem ntau famously ntawm dej molecules. Thaum ib tug molecule ntawm dej attracts lwm tus ob lub peev xwm daim ntawv cog lus ua ke; ntxiv ntau molecules ua rau ntau thiab ntau cov dej lo ua ke. Qhov no daim ntawv cog lus yog lub luag haujlwm rau cov qauv siv lead ua ntawm cov dej khov, uas tso cai rau nws ntab.
Vim li cas hydrogen bonding hauv dej tseem ceeb rau lub neej?
Lub xub ntiag ntawm hydrogen bonds kuj ua dej molecules ntau 'nplaum' los yog nyob rau hauv scientific cov ntsiab lus cohesive thiab nplaum. Cov nqi me me ntawm cov dej molecules tso cai rau lawv los ua ke uas yog vim li cas dej muaj 'daim tawv' uas cov kab me tuaj yeem taug kev, thiab piav qhia vim li cas dej tuaj yeem nqus tau straw yooj yim heev.
Pom zoo:
Dab tsi yog qhov ntau tshaj thiab tseem ceeb tshaj plaws inorganic compound nyob rau hauv lub cev?
Dej yog cov khoom siv tsis muaj tshuaj lom ntau tshaj plaws, ua rau ntau dua 60% ntawm lub ntim ntawm cov hlwb thiab ntau dua 90% ntawm cov kua hauv lub cev zoo li ntshav. Ntau yam tshuaj yaj nyob hauv dej thiab tag nrho cov tshuaj lom neeg uas tshwm sim hauv lub cev ua li ntawd thaum yaj hauv dej
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Dab tsi yog qhov tseeb ntawm lub cev lub cev lub cev kev xav xav?
Lub cev lub cev lub ntsiab lus kev xav (PSSH) yog ib txoj hauj lwm hauv lub tswv yim ntawm kev txawj ntse tsim los ntawm Allen Newell thiab Herbert A. 'Ib lub cim lub cev muaj qhov tsim nyog thiab txaus txhais tau tias rau kev ua haujlwm ntse.'
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej
Dab tsi yog hom keystone thiab vim li cas lawv tseem ceeb?
Keystone hom yog ib qho tseem ceeb rau lawv cov ecosystem tshwj xeeb thiab chaw nyob, raws li lawv ua lub luag haujlwm tseem ceeb rau kev muaj sia nyob ntawm cov tsiaj uas sib koom lawv lub tsev. Lawv txhais tag nrho ecosystem. Yog tsis muaj nws cov keystone hom, ecosystems yuav txawv heev los yog tsis muaj nyob rau hauv tag nrho