Video: DNA synthesis li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
DNA biosynthesis tshwm sim thaum lub cell faib, nyob rau hauv ib tug txheej txheem hu ua rov ua dua . Nws suav nrog kev sib cais ntawm cov DNA ob helix thiab tom qab ntawd synthesis ntawm complementary DNA strand, siv tus niam txiv DNA saw hlau raws li tus qauv.
Khaws qhov no hauv kev txiav txim siab, puas yog DNA synthesized nyob rau hauv 5 mus rau 3 kev taw qhia?
DNA replication mus rau hauv lub 5' rau 3 ' kev taw qhia vim DNA polymerase ua rau ntawm lub 3 '-OH ntawm cov hlua uas twb muaj lawm rau kev ntxiv cov nucleotides dawb.
Ib tug kuj yuav nug, dab tsi yog lub hom phiaj ntawm DNA synthesis? Cov Lub hom phiaj ntawm DNA replication yog tsim tau ob daim ntawv theej tib yam ntawm a DNA molecule. Qhov no yog qhov tseem ceeb rau kev faib cov cell thaum loj hlob lossis kho cov ntaub so ntswg puas. DNA replication xyuas kom txhua lub xov tooj tshiab tau txais nws tus kheej daim ntawv theej DNA.
Ntawm no, qhov txawv ntawm DNA replication thiab DNA synthesis yog dab tsi?
Lub ntsiab qhov sib txawv ntawm protein ntau synthesis thiab DNA replication yog qhov protein synthesis yog kev tsim cov protein ntau molecule raws li cov ntaub ntawv hauv gene hos DNA replication yog tsim los ntawm ib tug tiag tiag replica ntawm ib tug uas twb muaj lawm DNA molecule.
5 thiab 3 txhais li cas hauv DNA?
Cov 5' thiab 3 ' txhais tau tias "tsib prime" thiab "peb prime", uas qhia cov lej carbon nyob rau hauv DNA cov qab zib qaum. Cov 5 ' carbon muaj ib pawg phosphate txuas rau nws thiab 3 ' carbon a hydroxyl (-OH) pawg. Qhov no asymmetry muab ib DNA strand ib "direction".
Pom zoo:
Vim li cas cov txheej txheem ntawm cov protein synthesis tseem ceeb rau lub neej?
Protein synthesis yog cov txheej txheem tag nrho cov hlwb siv los ua cov protein, uas yog lub luag haujlwm rau tag nrho cov qauv ntawm tes thiab kev ua haujlwm. Proteins tseem ceeb hauv txhua lub hlwb thiab ua haujlwm sib txawv, xws li koom nrog cov pa roj carbon dioxide rau hauv qab zib hauv cov nroj tsuag thiab tiv thaiv cov kab mob los ntawm cov tshuaj phem
Koj yuav npaj ethylamine los ntawm Gabriel phthalimide synthesis li cas?
Koj tuaj yeem npaj cov amine thawj zaug los ntawm nws cov alkylazide los ntawm kev txo qis lossis los ntawm Gabriel synthesis. Hauv Gabriel synthesis, poov tshuaj phthalimide reacted nrog ib qho alkyl halide los tsim N-alkyl phthalimide. Qhov N-alkyl phthalimide no tuaj yeem hydrolyzed los ntawm aqueous acids los yog hauv paus rau hauv thawj amine
DNA ncaj qha protein synthesis li cas?
Hom RNA uas muaj cov ntaub ntawv los ua cov protein hu ua messenger RNA (mRNA) vim nws nqa cov ntaub ntawv, lossis cov lus, los ntawm DNA tawm ntawm lub nucleus mus rau hauv cytoplasm. Los ntawm cov txheej txheem ntawm kev sau thiab txhais lus, cov ntaub ntawv los ntawm cov noob yog siv los ua cov protein
Yuav ua li cas protein synthesis?
Protein synthesis yog cov txheej txheem uas cov hlwb ua cov protein. Nws tshwm sim nyob rau hauv ob theem: transcription thiab translation. Kev hloov pauv yog hloov cov lus qhia caj ces hauv DNA mus rau mRNA hauv lub nucleus. Tom qab mRNA ua tiav, nws nqa cov lus qhia rau ribosome hauv cytoplasm
Yuav ua li cas unwinds DNA nyob rau hauv protein synthesis?
Kev sau ntawv. Kev hloov pauv yog cov txheej txheem uas DNA tau theej (tshaj tawm) rau mRNA, uas nqa cov ntaub ntawv xav tau rau kev tsim cov protein. Kev hloov pauv yuav tshwm sim hauv ob kauj ruam dav. Ua ntej, ua ntej tus tub txib RNA yog tsim, nrog rau kev koom tes ntawm RNA polymerase enzymes