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20 November, 12:30

Thymine makes up 28% of the nucleotides in a sample of dna from an organism. approximately what percentage of the nucleotides in this sample will be guanine?

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  1. 20 November, 12:54
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    In DNA, the bases present undergo complementary pairing. The base pairs are as follows:

    Adenine - Thymine

    Cytosine - Guanine

    So if the DNA sample has 28% Thymine, the amount of Adenine will be equal which will be 28%.

    The remaining bases will occupy:

    100 - 28 * 2 = 44%

    Because Cytosine and Guanine will be in equal quantities,

    Guanine = 44/2 = 22%
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