If 20 per cent of the bases of a DNA double helix are adenine, what percentage of bases are cytosine?

Question

Quizplus · Accepted Answer

In a DNA double helix, adenine (A) pairs with thymine (T), and cytosine (C) pairs with guanine (G). If 20% of the bases are adenine, then 20% must also be thymine, making a total of 40% for A and T together. This leaves 60% for C and G together. Since C and G pair up in equal amounts, cytosine makes up half of this 60%, which is 30%.

If 20 Per Cent of the Bases of a DNA