Thaum pib, thiaj li hu ua cov proteins pib khi rau lub hauv paus chiv keeb replication, lub hauv paus-pair kab ntawm nucleotides hu ua oriC. Qhov kev khi no ua rau cov xwm txheej uas ua rau lub cev DNA ob npaug rau hauv ob lub cev DNA ib leeg.
Yuav ua li cas nucleotides khub thaum rov ua dua?
Nyob rau hauv ob-stranded DNA, cov nitrogenous bases ntawm ib tug strand khub nrog complementary bases nrog rau lwm strand; tshwj xeeb, A ib txwm pairs nrog T, thiab C ib txwm ua ke nrog G. Ces, thaum lub sij hawm DNA replication, ob strands nyob rau hauv ob chav helix cais.
Vim li cas DNA rov los ntawm 5 mus rau 3?
DNA polymerase ntxiv nucleotides rau deoxyribose (3') xaus strand hauv 5' rau 3' kev taw qhia.… Nucleotides tsis tuaj yeem muab ntxiv rau phosphate (5') kawg vim DNA polymerase tsuas tuaj yeem ntxiv DNA nucleotides hauv 5' mus rau 3' kev taw qhia. Lub lagging strand yog li synthesized nyob rau hauv fragments.
Dab tsi yog qhov sib lawv liag ntawm nucleotides hu ua?
Ib codon yog ib ntu ntawm peb DNA lossis RNA nucleotides uas sib haum nrog cov amino acid tshwj xeeb lossis nres teeb liab thaum lub sijhawm tsim cov protein.
Dab tsi yog qhov ua haujlwm ntawm cov kab ke ntawm nucleotides?
Cov kab mob nucleotide yog qib tseem ceeb tshaj plaws ntawm kev paub txog noob caj noob ces lossis genome. Nws yog daim ntawv qhia uas muaj cov lus qhia rau kev tsim lub cev, thiab tsis nkag siab txog kev ua haujlwm caj ces lossis kev hloov pauv tuaj yeem ua tiav yam tsis tau txais…
