Question

adenine bonds with ______________.
cytosine
guanine
adenine
thymine

Explanation:

In DNA, base - pairing rules are followed. Adenine (A) forms hydrogen bonds with Thymine (T) (in DNA) and with Uracil (U) in RNA. Since the context here is likely DNA (as Thymine is a DNA - specific base), Adenine bonds with Thymine.

Answer:

Thymine