Yuav ua li cas koj tus lej pyrimidine?
Yuav ua li cas koj tus lej pyrimidine?

Video: Yuav ua li cas koj tus lej pyrimidine?

Video: Yuav ua li cas koj tus lej pyrimidine?
Video: Qhia Koj tus lej Koob Hmoov 2024, Kaum ib hlis
Anonim

Yeej muaj tej yam yooj yim Tus lej koj cov nplhaib kom cov nitrogens xaus nrog qis tshaj tus lej ua ke. Yog li pyrimidines ua muaj (1, 3). Yog tias muaj lwm pab pawg ua haujlwm lawv tau qis tshaj plaws tus lej.

  1. Ntiv nplhaib nrog ntau nitrogens.
  2. Rings nrog lwm cov heteroatoms.
  3. Cov nplhaib loj dua.
  4. Nitrogen atom ze rau lub nplhaib sib tshuam.

Kuj tseem paub yog, purines thiab pyrimidines suav li cas?

Cov aromatic puag atoms yog naj npawb 1 txog 9 rau cov purines thiab 1 txog 6 rau pyrimidines ua . Cov piam thaj ribose yog suav nrog 1' txog 5'. Atoms lossis pawg txuas nrog lub hauv paus lossis qab zib rings atoms muaj tib yam tus lej raws li lub nplhaib atom uas lawv raug khi.

Tus qauv ntawm pyrimidine yog dab tsi? C4H4N 2

Yog li ntawd, yuav ua li cas carbons suav hauv DNA?

Atoms nyob rau hauv txhua DNA nucleotide tuaj yeem txheeb xyuas los ntawm cov lej tshwj xeeb. Cov pa roj carbon Tom qab ntawd cov atoms hauv cov suab thaj deoxyribose suav 1', 2', 3', 4', thiab 5' (pom liab hauv daim duab hauv qab no). Daim ntawv ceeb toom tias pawg phosphate txuas nrog 5'- thiab 3'- carbon atoms ntawm txhua qab zib los tsim cov caj qaum qaum ntawm DNA.

Dab tsi yog pyrimidines hauv DNA?

Pyrimidine yog ib qho ntawm ob chav kawm ntawm heterocyclic nitrogenous bases pom nyob rau hauv nucleic acids DNA thiab RNA: hauv DNA tus pyrimidines ua yog cytosine thiab thymine, hauv RNA uracil hloov thymine.

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