Question

In the structure of DNA, which nucleotide always pairs with adenine?

Answer 1

Thymine. The rules of base pairing or nucleotide pairing dictates that: adenine (purine) always pairs with thymine (pyrimidine) , cytosine (pyrimidine) always pairs with guanine (purine).

Answer 2

Answer: Thymine, got it right on the test :)