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21 April, 10:07

Analysis of the genome of a newly discovered bacterial strain reveals that it is composed of a double-stranded DNA molecule containing 16% thymine. Based on this information, what would you predict the percentage of cytosine to be?

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  1. 21 April, 11:17
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    Cytosine = 34%

    Explanation:

    Given percentage of thymine in a double stranded DNA of newly discovered bacterial strain = 16%

    Since thymine pairs with adenine, percentage of adenine in this DNA = 16%

    Total percentage of thymine and adenine = 16% + 16% = 32%

    Out of total 100%, the percentage of guanine + cytosine = 100-32% = 68%

    So, percentage of cytosine = 68% / 2 = 34%
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