Video: Qhov twg yog qhov ceev dua replication lossis transcription?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Taw qhia. DNA rov ua dua thiab kev sau ntawv yog cov txheej txheem caj ces tseem ceeb uas tseem ceeb rau kev loj hlob ntawm tes thiab kev faib tawm. coli, lub replisome txav 15 mus rau 30 zaug sai dua tshaj kev sau ntawv complexes thiab rov ua dua machinery kuj tuaj yeem rov qab kawg RNA polymerases.
Ib yam li ntawd, puas yog sau ntawv lossis txhais lus sai dua?
Yog txhais lus yog sai dua tshaj kev sau ntawv , nws yuav ua rau lub ribosome "sib tsoo" nrog RNA polymerase hauv prokaryotes qhov twg ob txheej txheem tuaj yeem tshwm sim ib txhij. Xws li kev sib txuas lus txhais lus tau dhau los ua cov ntaub ntawv kawm los ntawm cov duab xws li Daim duab 1.
Tsis tas li ntawd, vim li cas qhov ceev yog qhov tseem ceeb hauv kev luam ntawv dua li hauv kev sau ntawv? Ceev hauv rov ua dua yog tseem ceeb tshaj nyob rau hauv transcription vim DNA polymerase yuav tsum tau rov ua dua thaj tsam loj ntawm DNA thiab ceev yuav pab tau rov ua dua txheej txheem ua kom tiav rov ua dua sai sai. Cov kab ke no yog qhov tsim nyog rau kev khi ntawm RNA polymerase.
Ib yam li ntawd, nws raug nug, yuav ua li cas replication txawv ntawm transcription?
Kev sau ntawv luam DNA rau hauv RNA, thaum rov ua dua ua lwm daim qauv ntawm DNA. Ob qho txheej txheem koom nrog kev tsim cov molecule tshiab ntawm nucleic acids, xws li DNA lossis RNA; Txawm li cas los xij, kev ua haujlwm ntawm txhua tus txheej txheem yog heev txawv , nrog rau ib qho kev koom tes hauv gene qhia thiab lwm tus koom nrog hauv kev faib cell.
Dab tsi los thawj replication lossis transcription?
Raws li DNA rov ua dua , ib nrab unwinding ntawm ob lub helix yuav tsum tshwm sim ua ntej transcription tuaj yeem coj qhov chaw, thiab nws yog RNA polymerase enzymes uas ua rau cov txheej txheem no. Tsis zoo li DNA rov ua dua , nyob rau hauv uas ob strands yog theej, tsuas yog ib tug strand tau sau tseg . Lub DNA molecule rov ua cua kom rov ua dua ob lub helix.
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