Triplet - wani aikin naúrar na bayanai a cell

T - sashi ne na karanta bayanai daga wata nucleic acid, wanda aka gane a cikin translation tsari a kan salula ribosomes. Nucleotides na DNA kawo bayani game da shigar wanda ke aiki gina jiki, saboda haka yana da muhimmanci don karanta shi daidai, ba tare da kurakurai da kuma rashin daidaito. Saboda haka, da triplet matsayin daya daga cikin kaddarorin da kwayoyin code ya sa ya yiwu a aika da aminci da kaddara jerin amino acid din da na nan gaba.

Triplet - a naúrar na DNA bayanai

Nucleic acid ne biopolymers wanda da monomers ne nucleotides. Recent form a ci gaba da sarkar kayyade bayanai readout wanda faruwa a kwafi mataki. Riga nan m DNA karatu frame, a kan abin da na kira manzo RNA ya kuma inganta farkon da kuma gama triplets.

Karanta firam dole ba canza lokacin kwafi, kamar yadda wannan na iya haifar m sakamakon na gina jiki kira. Alal misali, peptide za a iya taqaitaccen, a hada quite a daban-daban amino acid jerin, don zama yiwuwar cutarwa ga Kwayoyin.

Da bukatar taso da watsa shirye-shirye triplets taka - kai tsaye karanta bayanai daga RNA ta samar da farko tsarin da sunadari. Kuma a sa'an nan tambaya taso: don haka da cewa wannan triplet? Don me bã ya bukatar wani keji da kuma abin da ta nazarin halittu rawa?

Triplet darajar a cikin furotin biosynthesis

The bayanai kaddara a cikin DNA da RNA sa'an nan a fili tsari a cikin raba sassa. Cigaba da nucleotides jerin dole ne a wasu hanya rushe a cikin aikin segments, wanda za a iya aiwatar da furotin biosynthesis. Uku na wani tausayi - wannan shi ne wanda aikin naúrar da kuma tushen polypeptide kira, ba tare da abin da karatu na bayanai daga nucleic acid ne ba zai yiwu ba.

Triplet ko codon kunshi uku a jere nucleotides, suna fuskantar juna. Kowace daga cikinsu encodes amino acid daya, wacce ake kawota via tRNA zuwa ribosomes a lokacin gina jiki biosynthesis.

Yana da ban sha'awa cewa wannan amino acid iya shige da dama daban-daban codons. Duk da haka, wanda irin wannan triplet encodes guda amino acid. Kuma unambiguity degeneracy na kwayoyin code ne wani hanya, ta hanyar abin da cell gudana kira na gina jiki. Alal misali, amino acid methionine sauya ta kawai guda codon Aug (adenine, uracil, Bibyun, bi da bi). A valine, bi da bi, da aka kaddara da dama triplets, kuma daga gare su, Sum, GUC, GUA, kuma GUG.

Wanne nucleotides wani bangare ne na triplets?

A triplet DNA - shi ne mai sa na uku a jere nucleotides, a tsaye kusa da juna. Iyakoki na kowane codon tsananin gyarawa kamar yadda su hana frame motsi da kuma ba kafa a cikin m m, kuma ba daidai ba gina jiki. Uku daga wani irin - yana da ilmin halitta, uku nucleotides, duk da haka, nucleic acid kunshi dama iri monomers. Mene ne nucleotides a DNA da RNA?

Duk da monomers na nucleic acid ya kasu kashi biyu manyan kungiyoyin: purine da pyrimidine. Purine sansanonin dokoki wani rukuni na nucleotides ya kunshi adenine da kuma Bibyun. Su rarrabe shi ne cewa kwayoyin da aka hada biyu carbon zobba.

Wani rukuni - shi nucleotides, kwayoyin kwarangwal wanda aka kafa ta daya kawai zobe. Irin wannan monomers hada da saitosin, da kuma taimain (DNA) da kuma uracil (maimakon taimain a RNA).

Kuma triplet codon - ne wanda kuma wannan?

A ra'ayi na "codon" da aka samu a cikin bayanin fassarar tsari a lokacin da RNA kwayoyin karanta bayanai game da amino acid, wanda sun zama wani ɓangare na wani sabon gina jiki. T - a mafi fadi ra'ayi, kuma shi ne amfani a cikin bayanin RNA karatu frame kuma, a wasu lokuta, da kuma DNA. Ko da yake har da fassarar a cikin yi wuya a gaya inda iyakar tsakanin biyu m triplets, amma a ka'idar wannan layi ne m, kuma ba ya canza.

A gaskiya ma, wani triplet codon, da kuma - wannan shi ne daidai da wancan. Iyakar abin da bambanci shi ne cewa a lokacin da Kalmar "codon" da ake amfani da, da kuma lokacin da "triplet". Idan na farko da za a iya ji a cikin bayanin watsa shirye-shirye, na biyu da ake amfani da nuna uku nucleotides a nucleic acid.