Cov pyrimidines, cytosine thiab uracil, yog me dua thiab muaj ib lub nplhaib, hos cov purines, adenine thiab guanine, loj dua thiab muaj ob lub nplhaib.
Yuav ua li cas ib lub nplhaib hu ua?
Lub hauv paus nitrogenous yog ob lub nplhaib sib dhos hu ua purine lossis ib lub nplhaib hu ua a pyrimidine. Muaj tsib lub hauv paus nitrogenous; adenine, guanine, thymine, cytosine thiab uracil.
Puas yog pyrimidines puag khub?
Pyrimidines yog cov tshuaj tsw qab nitrogen heterocycles nrog cov qauv zoo ib yam li benzene tab sis muaj ob lub nitrogen atoms ntawm 1 thiab 3 txoj haujlwm ntawm lub nplhaib. … Cytosine thiab thymine yog ob lub hauv paus loj pyrimidine hauv DNA thiab puag khub (saib Watson–Crick Pairing) nrog guanine thiab adenine (saib Purine Bases), feem.
YPuas adenine ib lub nplhaib puag?
Lub hauv paus Cheebtsam ntawm nucleic acids yog cov tshuaj heterocyclic nrog cov nplhaib uas muaj nitrogen thiab carbon. Adenine thiab guanine yog purines, uas muaj ib khub ntawm fused rings; cytosine, thymine, thiab uracil yog pyrimidines, uas muaj ib lub nplhaib(Daim duab 4-2).
YPyrimidine Base yog dab tsi?
(pī-rĭm′ĭ-dēn′) Ib pawg ntawm cov organic tebchaw muaj ib lub nplhaib nrog alternating carbon thiab nitrogen atoms. Pyrimidines suav nrog cov hauv paus cytosine, thymine, thiab uracil, uas yog cov khoom ntawm nucleic acids.
