2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Thaum lub sijhawm DNA rov ua dua, ib qho enzyme hu ua DNA helicase"unzips" cov molecule ntawm ob-stranded DNA.
Dab tsi enzyme cuam tshuam thaum DNA unzips?
Nyob rau hauv DNA replication, DNA helicases unwind DNA ntawm txoj haujlwm hu ua keeb kwm qhov chaw synthesis yuav pib. DNA helicase txuas ntxiv mus ua kom lub DNA tsim ib lub qauv hu ua replication diav rawg, uas yog lub npe rau lub forked tsos ntawm ob strands ntawm DNA raws li lawv unzipped sib nrug.
Yuav ua li cas enzymes koom nrog hauv kev rov ua dua DNA?
Lub hauv paus enzyme koom nrog yog DNA polymerase, uas catalyzes koom nrog deoxyribonucleoside 5′-triphosphates (dNTPs) los tsim cov saw DNA loj hlob. Txawm li cas los xij, DNA rov ua dua yog qhov nyuaj dua li ib qho tshuaj tiv thaiv enzymatic.
Dab tsi yog 3 lub ntsiab enzymes?
YEnzymes
- amylase thiab lwm yam carbohydrase enzymes zom cov hmoov txhuv nplej siab rau hauv qab zib.
- protease enzymes zom cov proteins rau hauv cov amino acids.
- lipase enzymes zom cov lipids (cov rog thiab roj) rau hauv fatty acids thiab glycerol.
Yuav ua li cas enzyme tsis xav tau rau DNA replication?
RNA polymerase yog ib qho enzyme uas sau RNA los ntawm DNA; Nws tsis yog qhov tseem ceeb rau DNA replication. Cov enzyme no yooj yim rau confuse nrog primase, nws lub luag haujlwm tseem ceeb yog los tsim cov RNA primers tsim nyog rau kev rov ua dua.
Pom zoo:
Cov khoom xyaw twg hauv qab no ua cov tshuaj tsw qab hauv cov tshuaj txhuam hniav?
Sodium lauryl sulfate (SLS) yog surfactant feem ntau siv. YPuas yog tshuaj txhuam hniav puas yog surfactant? Surfactants. Ntau, txawm tias tsis yog tag nrho, tshuaj txhuam hniav muaj sodium lauryl sulfate (SLS) lossis lwm yam surfactants (detergents).
Ntawm qhov twg ntawm cov ces kaum hauv qab no yog cov haujlwm cosecant tsis tau txhais?
Qhov tseeb, tus nqi xa rov qab los ntawm kev ua haujlwm cosecant rau lub kaum sab xis ntawm xoom degrees lossis ib puas yim caum degrees yog suav tias yog tsis tau txhais, txij li qhov sib npaug csc (θ)= 1 / sin θ ) yuav suav nrog kev faib los ntawm xoom.
Qhov twg hauv qab no yog qhov piv txwv ntawm qhov tsis suav nrog cov lej tsis suav nrog?
Pi is a non-terminating, non-repeating decimal. π=3.141 592 653 589 793 238 462 643 383 279 … e is a non-terminating, non-repeating decimal. Ib qho piv txwv ntawm tus lej tsis suav nrog yog dab tsi? Piv txwv: 0.5, 2.456, 123.456, thiab lwm yam.
Lub sijhawm ua pov thawj uas cov enzymes hauv qab no nyeem cov dna?
DNA polymerase muaj nuj nqi proofreading. Yuav ua li cas cov enzymes ua pov thawj DNA? DNA polymerases yog cov enzymes tsim DNA hauv hlwb. Thaum lub sij hawm DNA replication (copying), feem ntau DNA polymerases tuaj yeem "kuaj lawv cov haujlwm"
Los ntawm qhov kev txiav txim ntawm enzymes tus nqi ntawm cov tshuaj tiv thaiv biochemical?
Enzymes yog cov khoom siv roj ntsha. Catalysts txo qis lub zog ua kom muaj zog rau cov tshuaj tiv thaiv. Qhov qis dua lub zog ua kom muaj zog rau cov tshuaj tiv thaiv, qhov nrawm dua. Yog li enzymes nrawm cov tshuaj tiv thaiv los ntawm kev ua kom lub zog qis.
