In the DNA of certain bacterial cells, 16% of the nucleotides are adenine. What are the percentages of the other nucleotides in the bacterial DNA?
A)16% thymidine, 34% guanine, 34% cytosine
B)34% uracil, 16% guanine, 16% cytosine
C)34% thymidine, 34% guanine, 16% cytosine
D)34% thymidine, 16% guanine, 34% cytosine

Question

Quizplus · Accepted Answer

According to Chargaff's rules, in DNA, the amount of adenine (A) is equal to thymine (T), and the amount of guanine (G) is equal to cytosine (C). Since 16% of the nucleotides are adenine, 16% must also be thymine. This leaves 68% for guanine and cytosine combined, so each must be 34%.

In the DNA of Certain Bacterial Cells, 16% of the Nucleotides