Video: Puas muaj pyrimidine hauv paus hauv DNA?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Qhov tseem ceeb tshaj plaws lom neeg hloov pauv pyrimidines ua yog cytosine, thymine, thiab uracil. Cytosine thiab thymine yog ob qho loj pyrimidine hauv paus hauv DNA thiab puag khub (saib Watson–Crick Pairing) nrog guanine thiab adenine (saib Purine Bases ), raws. Hauv RNA , uracil hloov thymine thiab puag ua ke nrog adenine.
Ua kom pom qhov no, cov hauv paus twg muaj nyob hauv DNA?
Hauv DNA, muaj plaub lub hauv paus sib txawv: adenine (A) thiab guanine (G) yog cov purines loj dua. Cytosine (C) thiab thymine (T) yog cov pyrimidines me. RNA kuj muaj plaub lub hauv paus sib txawv. Peb ntawm no yog tib yam li hauv DNA: adenine , guanine , thiab cytosine.
Kuj Paub, qhov twg pyrimidine puag ib txwm pom hauv DNA tab sis tsis nyob hauv RNA? RNA muaj cytosine thiab ua uracil raws li pyrimidine[1] puag thaum DNA muaj cytosine thiab thymine . Yog li ntawd, URACIL [2] muaj nyob hauv RNA, Tab sis tsis muaj nyob hauv DNA. Nws lub hauv paus sib npaug, tam sim no hauv DNA yog Thymine , uas muaj ib pawg methyl tam sim no ntawm 5 'Carbon.
Ib yam li ntawd, nws tau nug, cov hauv paus twg yog purines thiab uas yog pyrimidines?
Purines thiab Pyrimidines yog cov hauv paus nitrogenous uas ua rau ob hom nucleotide hauv paus hauv DNA thiab RNA . Ob-carbon nitrogen nplhaib puag ( adenine thiab guanine ) yog purines, thaum ib-carbon nitrogen nplhaib puag ( thymine thiab cytosine ) yog pyrimidines.
Dab tsi nitrogenous bases pom hauv DNA?
Tsib pom muaj nitrogenous bases nyob rau hauv nucleic acids (Fig. 4); adenine (A), guanine (G), thiab cytosine (C) yog nyob rau hauv ob qho tib si DNA thiab RNA , whereas thymine (T) yog yuav luag nkaus xwb pom hauv DNA , thiab uracil (U) yuav luag tshwj xeeb hauv RN A. DNA thiab RNA yog qhov ntsuas los ntawm lawv qhov nqus ntawm UV teeb ntawm 260 nm.
Pom zoo:
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