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If 420 out of 2000 nucleotides contain adenine how many pyrmidines are there |
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Answer» adenine(A) and guanine(G) = purines = two rings structure thymine(T) and CYTOSINE(C) = pyrimidines = one RING structure now, according to Chargaff , no. of A = no. of T and no. of G = no. of C 420 = A = T total A + T = 420 + 420 = 840 from 2000 nucleotides , 840 = A + T so G + C = 2000 - 840 = 1160 since G = C , ⇒ 2 C = 1160 ⇒ G = C = 580 now, total pyrimidines = T + C = 580 + 420 = 1000 |
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