Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
A) 8%
B) 16%
C) 42%
D) 58%

Question

Quizplus · Accepted Answer

In DNA, the amount of cytosine (C) is equal to the amount of guanine (G), and the amount of adenine (A) is equal to the amount of thymine (T). If cytosine is 42%, then guanine is also 42%, making up 84% of the DNA. The remaining 16% must be adenine and thymine, with each being 8%.

Cytosine Makes Up 42% of the Nucleotides in a Sample