A sample of double-stranded DNA contains 28% thymine. Approximately what percent of the nucleotides in this sample will be guanine?
A) 8%
B) 16%
C) 22%
D) 72%

Question

Quizplus · Accepted Answer

In double-stranded DNA, the amount of adenine (A) equals thymine (T), and the amount of guanine (G) equals cytosine (C). If thymine is 28%, then adenine is also 28%. This leaves 44% for guanine and cytosine combined, so guanine is approximately 22%.

A Sample of Double-Stranded DNA Contains 28% Thymine