Kev sim caj ces pom tau tias cov amino acid nyob rau hauv qhov tseeb encoded los ntawm ib pawg ntawm peb lub hauv paus, lossis codon.
Puas muaj pes tsawg lub hauv paus nyob hauv codon?
Lawv tau pom tias luv luv mRNA ib ntus-txawm tias ib qho codon ( peb lub hauv paus)-tseem tuaj yeem khi rau ib qho ribosome, txawm tias qhov luv luv no tsis muaj peev xwm los tswj cov protein synthesis.. Lub ribosome-bound codon tuaj yeem ua khub nrog ib qho tshwj xeeb tRNA uas nqa cov amino acid teev los ntawm codon (Daim duab 2).
Yuav ua li cas lub hauv paus tsim ib codon?
Codons yog tsim los ntawm ib qho kev sib xyaw triplet ntawm plaub nitrogenous hauv paus adenine (A), guanine (G), cytosine (C), lossis uracil (U). Ntawm 64 qhov ua tau ua ntu zus, 61 qhia txog 20 amino acids uas tsim cov proteins thiab peb yog cov cim qhia.
Vim li cas ib codon thiaj muaj 3 lub hauv paus?
Lub nucleotide triplet uas encodes ib qho amino acid hu ua codon. Txhua pawg ntawm peb nucleotides encodes ib amino acid Txij li thaum muaj 64 kev sib txuas ntawm 4 nucleotides coj peb zaug ib zaug thiab tsuas yog 20 amino acids, cov cai yog degenerate (ntau tshaj ib codon ib amino acid., feem ntau).
4 codons yog dab tsi?
Cov kab ke no tau tawg mus rau hauv peb-nucleotide units hu ua codons (Daim duab 1). Peb tsab ntawv ntawm codons txhais tau hais tias plaub nucleotides pom nyob rau hauv mRNA - A, U, G, thiab C - tuaj yeem tsim tau tag nrho 64 qhov sib txawv.
