In a Bacterial Species, 20% of the Bases in Its

Question

In a bacterial species, 20% of the bases in its DNA are C. What percent of the bases are G?
A) 80%
B) 40%
C) 20%
D) 10%

Accepted Answer

According to Chargaff's rules, the amount of guanine (G) is equal to the amount of cytosine (C) in a DNA molecule. Therefore, if 20% of the bases are cytosine (C), then 20% must also be guanine (G).