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In a DNA percentage of thymine is 20, What is the percentage of guanine ?

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In a DNA percentage of thymine is 20, What is the percentage of guanine ?

(a) 20%

(b) 40%

(c) 30%

(d) 60%

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1 Answer

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Best answer

Correct option (c) 30%

Explanation

Total DNA [100] = A + T + C + G

A = 20% (given)

A = T (base pairing rule)

100 = 20 + 20 + C + G

C + G = 100 - 40 = 60

C = G = 30 (C = G) 

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