Video: Dab tsi yog cov khoom uas tsim los ntawm DNA thiab cov protein nruj nreem ntim ua ke?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Eukaryotic chromosomes muaj DNA thiab cov protein, nruj nreem ntim ua ke los tsim cov khoom hu ua Chromatin muaj DNA uas nruj nreem coiled nyob ib ncig ntawm cov pro-teins hu ua raws li qhia nyob rau hauv daim duab 12–10.
Ua li no, peb lub hauv paus ntawm tRNA molecule yog dab tsi ntxiv rau mRNA?
Lub hauv paus mRNA tau muab faib ua peb pawg, hu ua codons . Txhua codon muaj ib tug complementary txheej ntawm lub hauv paus, hu ua ib anticodon . Anticodons yog ib feem ntawm hloov RNA (tRNA ) cov molecules. Txuas rau txhua tRNA molecule yog ib qho amino acid - qhov no, cov amino acid yog methionine (met).
Vim li cas cov strands ntawm DNA molecule hais kom ua tiav? Vim txhua tus DNA strand siv tau los ua lwm yam Strand , cov strands yog hais tias yuav complementary . Xyuas kom meej tias txhua qhov tshwm sim ntawm tes muaj tib cov txheej txheem tiav DNA molecules.
Ua li no, dab tsi yog qhov tseem ceeb enzyme hauv DNA replication?
Lub hauv paus enzyme koom nrog yog DNA polymerase , uas catalyzes koom nrog deoxyribonucleoside 5'-triphosphates (dNTPs) los tsim kev loj hlob DNA saw hlau. Txawm li cas los xij, DNA replication Nws yog qhov nyuaj ntau dua li ib qho tshuaj tiv thaiv enzymatic.
Dab tsi yog qhov hloov pauv hauv DNA ib ntus uas cuam tshuam cov ntaub ntawv ntawm caj ces?
Ib cuab yeej cuab tam hloov pauv hauv DNA ib ntus uas cuam tshuam rau cov ntaub ntawv ntawm caj ces npe a. kev hloov pauv.
Pom zoo:
Dab tsi yog qhov me me ntawm cov khoom uas khaws cov khoom ntawm lub caij?
Ib qho atom yog qhov tsawg tshaj plaws ntawm txhua lub caij uas tseem khaws cov yam ntxwv ntawm lub caij ntawd. Ib daim ntawm ib lub caij uas peb tuaj yeem pom lossis kov yog ua los ntawm ntau, ntau atoms thiab tag nrho cov atoms yog tib yam lawv txhua tus muaj tib tus naj npawb ntawm protons
Dab tsi yog cov hlau nplaum uas ua los ntawm qhov kev npaj ntawm electrons yog dab tsi?
Electrons yog teem rau hauv plhaub thiab orbitals nyob rau hauv ib tug atom. Yog hais tias lawv sau lub orbitals kom muaj ntau spin taw tes rau hauv qab (los yog vice versa), txhua atom yuav ua zoo li ib tug me me hlau nplaum. Thaum ib daim ntawm cov hlau tsis muaj hlau nplaum (lossis lwm yam khoom siv ferromagnetic) raug rau sab nraud magnetic teb, ob yam tshwm sim
Qhov kev sib npaug twg yog qhov tsim nyog los suav cov cua sov uas tsim los ntawm HCl NaOH cov tshuaj tiv thaiv?
Xam cov naj npawb ntawm moles ntawm lub hauv paus koj ntxiv los txiav txim siab molar tshav kub ntawm qhov nruab nrab, qhia siv qhov sib npaug Δ H = Q ÷ n, qhov twg 'n' yog tus naj npawb ntawm moles. Piv txwv li, xav tias koj ntxiv 25 mL ntawm 1.0 M NaOH rau koj HCl los ua kom muaj cua sov ntawm nruab nrab ntawm 447.78 Joules
Puas yog atoms ua los ntawm cov ntsiab lus los yog cov khoom tsim tawm ntawm atoms?
Atoms yeej ib txwm ua los ntawm cov khoom. Atoms qee zaum ua los ntawm cov khoom. Lawv txhua tus muaj ob tsab ntawv hauv lawv cov cim atomic. Cov muaj pes tsawg leeg
Dab tsi yog txhais los ntawm lub sij hawm dissociation thiab dab tsi yog ib qho piv txwv ntawm cov khoom uas dissociates?
Dissociation, nyob rau hauv chemistry, sib cais ntawm ib yam khoom mus rau hauv atoms los yog ions. Thermal dissociation tshwm sim ntawm qhov kub thiab txias. Piv txwv li, hydrogen molecules (H 2) dissociate rau hauv atoms (H) ntawm kub heev; ntawm 5,000 ° K txog 95% ntawm cov molecules hauv cov qauv ntawm hydrogen yog dissociated rau hauv atoms