An alien DNA-like molecule is isolated from the frozen remai…

An alien DNA-like molecule is isolated from the frozen remains of a life form found beneath the Martian polar ice caps. In this sample, for every base designated Q, there is twice that amount of base R; for every base Z, there is twice that amount of base S. Assuming that there is base bonding, a likely conclusion from these observed ratios is that one base _______ bonds with _______ base _______.