Respuesta :

According to Chargaff's rule, in a DNA, the amount of purine is equal to the amount of pyrimidine. Therefore, if 30% of an organism's DNA is thymine, then it's complementary purine, adenine will also be 30%. Rest 40% will be constituted by equal amounts of guanine and cytosine, i.e., 20% each.
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Answer:

20%

Explanation:

if thymine is 20 % so as the adinine is also 20% , beacuse adinine always pair with thymine

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