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If Adenine is present 20% in DNA then concentration of pyrimidine in DNA would be: (A) 80% (B)20% (C)50% (D)70%
DNA constitutes: adenine(A), guanine(G),cytosine(C) and thymine(T)Adenine and Guanine have PURINE basesThymine and Cytosine have PYRIMIDINE bases Now ATQ,%A = 20And we know that amount in DNA of A is equal to T & of G is equal to CThus, %T =20 now, %G = %C, thus, %(G+C) = 100- %(A+T) =60%thus %G =%C =30%Therefore. Concentration of Pyrimidine: %(T+C) = 50% so, the correct answer is option C. Hope it cleared all the doubts.Then please do give a thumbsup!😊👍
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