A sample of DNA from a human skin cell contains 32% cytosine bases. Approximately what percentage of the bases in this sample will be thymine

Question

Biology

Adrienne

15 August, 15:13

A sample of DNA from a human skin cell contains 32% cytosine bases. Approximately what percentage of the bases in this sample will be thymine

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Answers (2)

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Josephine Middleton · Answer 1

18%.

If a cell contains 32% cytosine then it contains the same amount of its base pair, guanine. That means 64% of the cell is cytosine and guanine. The remaining 32% must be adenine and thymine, of which there should be equal amounts. Therefore to fine the amount of thymine divide 32 in half, which gives you 18%.

Luis Bradley · Answer 2

is it 18%?

Explanation:

I don't think this is correct, but the four bases are adenine, thymine, guanine, and cytosine. So, if there is 32% cytosine then there has to be 32% guanine because that pairs up with cytosine. so percentages are out of 100, meaning that 100-64=36 which is how much percent we have left for the other two bases. 36/2=18 which would be the percent of adenine and thymine because those two pair up in dna.