Question

What is the percentage of Thymine if you have 18 % Guanine in a strand of DNA?

32
25
22
18

Answer 1

Answer: 32%

Explanation: Remember the base pairing rules: cytosine with guanine and adenine with thymine, in equal amounts. That being said, the amount of cytosine is equal to the amount of guanine, meaning that it is 18% as well. Since 18+18=36, you know that the remaining 64% is adenine and thymine collectively. To figure out how much of each base there is, you could divide 64% between each nitrogenous base to get 32% each.

Hope this helps,

Lacia :)