Question

If a DNA sample were composed of 20% guanine, what would be the percentage of cytosine? (A) 40 DNA B) 30 C) 60 D) 20 \

Answer 1

Basic background info:

- DNA has four bases

- Guanine pairs with Cytosine and Adenine pairs with Thyamin

Now, because G had to pair with C, it makes sense for them to be present in equal amounts right? I cant have 40% G and 10% C because where will rest 30% of the G go?

so, if DNA has 20% guanine, then it also has 20% of cytosine