Q.

In DNA 20% bases are adenine. What percentage of bases are pyrimidines?

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a

30%

b

50%

c

20%

d

60%

answer is C.

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Detailed Solution

According to Chargaff,  If A = 20%, then T = 20% then A + T= 40%
G + C = 100 - 40 = 60%
G = C = 30%
Pyrimidine = 30% + 20% = 50%.

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