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17 July, 12:01

Read the scenario. Jake and Pari are completing a biology assignment. One of the questions asks them to determine the base amounts in a sample of DNA. The students come up with the following base amounts: 10% adenine 15% thymine 40% cytosine 40% guanine

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  1. 17 July, 12:25
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    There should be 10% thymine

    Explanation:

    DNA bases come in specific pairs. Guanine pairs up with cytosine and adenine pairs up with Thymine.

    According to the problem the DNA sample was 40% cytosine and 40% guanine, so this is correct, there are equal amounts of cytosine and guanine. Now Thymine needs to have equal amounts as adenine, but adenine only has 10%.

    If we match up the amount of adenine to thymine, we would have 15% adenine and 15% thymine, but that would excede 100%. So you need to match the thymine to adenine.

    10% adenine + 10 % thymine + 40% cytosine + 40% guanine = 100%
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