alleryIn a DNA molecule with 20% cytosine, what is the percentage of adenine?
A30%
B60%
C20%
D50%
Answer & Solution
Correct answer: A. 30%
**Chargaff:** C = G = 20%, so C + G = 40%.
Hence A + T = 60%.
Since A = T, **A = 30%**.
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