If a eukaryotic chromosome was composed of 20% adenine, how much cytosine should theoretically be present in that same chromosome?
A) 40%
B) 30%
C) 60%
D) 10%
E) 20%

Question

Quizplus · Accepted Answer

According to Chargaff's rules, in DNA, the amount of adenine (A) equals thymine (T), and the amount of cytosine (C) equals guanine (G). If adenine is 20%, then thymine is also 20%. This leaves 60% for cytosine and guanine combined, so cytosine would be 30%.

If a Eukaryotic Chromosome Was Composed of 20% Adenine, How