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  4. In a double stranded DNA molecule the percentage of cytosine is 18. What is the percentage of adenine?

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Q. In a double stranded DNA molecule the percentage of cytosine is 18. What is the percentage of adenine?

JIPMERJIPMER 2002

Solution:

According to Chargaff rules, double stranded DNA consist A = T and G = C. In problem C = 18% so G will be 18% rest 64% contains A and T which would participate A = 32% and T = 32%.