Qhov Tseem Ceeb Qhov txawv - Template vs Coding Strand
Nyob hauv ntau yam kab mob, DNA ua raws li cov ntaub ntawv khaws cia, thaum RNA ua tus xa xov. Cov txheej txheem ntawm cov synthesis ntawm RNA los ntawm DNA yog hu ua transcription, uas tswj cov noob qhia thiab zus tau tej cov proteins nyob rau hauv ntau yam kab mob lom. Hauv cov txheej txheem no, ob lub DNA strands tau muab cov npe tshwj xeeb raws li lawv txoj kev koom tes. Template strand yog DNA strand uas ua raws li tus qauv rau RNA synthesis thaum lwm txoj hlua hu ua coding strand. Qhov sib txawv tseem ceeb ntawm ob txoj hlua no yog cov qauv strand muaj qhov sib txawv ntawm lub hauv paus ntawm RNA thaum coding strand muaj tib lub hauv paus sib lawv liag ntawm RNA (nrog rau kev zam ntawm thymine es tsis txhob uracil). Tsis yog tag nrho DNA strands hauv ib lub xovtooj tau hloov mus rau RNA. Transcription synthesizes tag nrho cov hom RNA xws li mRNA, tRNA, rRNA, snRNA, miRNA thiab siRNA. Muaj ob peb qhov sib txawv ntawm RNA transcription ntawm prokaryotes thiab eukaryotes. Piv txwv li, nyob rau hauv eukaryotes, cov txheej txheem transcription yog ntau nyuaj tshaj nyob rau hauv prokaryotes vim muaj kev koom tes ntawm ib tug loj tus naj npawb ntawm transcription yam. Txawm li cas los xij, lub hom phiaj ntawm tsab xov xwm no yog qhia qhov txawv ntawm template strand thiab coding strand.
Template Strand yog dab tsi?
Template strand yog DNA strand, uas ua raws li tus qauv rau kev sib txuas ntawm RNA. RNA polymerase nyeem cov strand ntawm 3' mus rau 5.'Template strand tsis koom nrog hauv coding, yog li, hu ua non-coding strand. Cov nucleotide ib ntus ntawm cov qauv strand yog ntxiv rau mRNA molecule thiab coding strand.
Coding Strand yog dab tsi?
Coding strand txiav txim siab qhov sib lawv liag ntawm RNA strand. Coding strand muaj tib lub nucleotide sib lawv liag ntawm RNA nrog kev zam ntawm Uracil es tsis txhob Thymine. Coding strand kuj tseem hu ua kev nkag siab strand vim nws txiav txim siab RNA ib ntus uas thaum kawg coded rau ib qho amino acid ib ntus ntawm cov protein. Cov strand no nyeem nyob rau hauv tus thawj coj ntawm 5' kawg mus rau 3' kawg. 5' kawg muaj cov phosphate pawg txuas nrog 5' carbon atom, whereas 3' kawg muaj cov phosphate pawg txuas nrog 3' carbon atom lossis hydroxyl pawg yog nyob rau ntawm qhov kawg ntawm DNA saw.
Qhov txawv ntawm Template thiab Coding Strand yog dab tsi?
Function:
Template Strand: Template strand ua tus qauv rau RNA synthesis.
Coding Strand: Coding strand muaj tib qhov sib lawv liag ntawm RNA tshiab.
Lwm Lub Npe:
Template Strand: Template strand tseem hu ua antisense strand lossis [-] strand.
Coding Strand: Coding strand yog lub npe hu ua sense strand, [+] lossis nontemplate strand.
Base Sequence:
Template Strand: Template strand yog ntxiv rau RNA uas yog tsim los.
Coding Strand: RNA sib lawv liag sib npaug rau coding strand ntawm DNA nrog muaj Thymine es tsis txhob Uracil.
