A virus has a base ration of (A+G)/(U+C) = 1....?

I'm not sure how to determine what this question is asking, and I can't find it in the book. Could anyone help explain it to me? Thank you so much :]





Question:


A virus has a base ratio of (A+G) / (U+C) = 1. What type of virus is this?


A. a single-stranded DNA virus


B. a single-stranded RNA virus


C. a double-stranded DNA virus


D. a double-stranded RNA virus


E. a retrovirus

A virus has a base ration of (A+G)/(U+C) = 1....?
It suggests that it is a double-stranded RNA virus. It is RNA not DNA because it uses Uracil and not Thymine. That it is double-stranded is suggested by the fact that in double stranded DNA or RNA A pair with T/U and C pairs with G. Thus, the AG content must be equal to the UC content.