DNA yog ob-stranded, tab sis tsuas yog ib qho strand ua tus qauv rau kev sau npe ntawm txhua lub sijhawm. Cov template strand no yog hu ua the noncoding strand Cov nontemplate strand yog hu ua coding strand vim nws cov kab ke yuav zoo ib yam li cov tshiab RNA molecule.
DNA hu ua dab tsi?
Kev txhais lus yog tus txheej txheem uas cov ntaub ntawv nyob rau hauv ib txoj hlua ntawm DNA tau theej rau hauv lub molecule tshiab ntawm messenger RNA (mRNA). DNA muaj kev nyab xeeb thiab ruaj khov khaws cov khoom siv caj ces hauv cov nuclei ntawm cov hlwb raws li kev siv, lossis qauv.
Pob ob kab DNA puas tau sau ntawv?
Tsis zoo li DNA replication, nyob rau hauv uas ob strands yog theej, tsuas yog ib txoj hlua yog transcribed. Cov strand uas muaj cov noob yog hu ua qhov kev nkag siab strand, thaum lub strand complementary yog antisense strand.
DNA hu ua dab tsi?
Nyob rau hauv ob qho tib si, kev rov ua dua tau tshwm sim sai heev vim tias ntau yam polymerases tuaj yeem ua rau ob txoj hlua tshiab tib lub sijhawm los ntawm kev siv txhua qhov tsis muaj kab mob los ntawm thawj DNA ob lub helix ua tus qauv. Ib tug ntawm cov thawj strands yog hu ua tus thawj strand, where the other is called the lagging strand.
mRNA Strand yog dab tsi?
Kev txhais lus yog thawj feem ntawm lub hauv paus dogma ntawm molecular biology: DNA → RNA. Nws yog kev hloov ntawm cov lus qhia caj ces hauv DNA mus rau tus tub txib RNA (mRNA). Thaum lub sijhawm sau ntawv, ib txoj hlua ntawm mRNA tau ua kom yog ntxiv rau ib txoj hlua ntawm DNA.
