Final answer:
Adenine and thymine form two hydrogen bonds, while cytosine and guanine form three hydrogen bonds, ensuring the stability of the DNA structure.
Step-by-step explanation:
The question asks about the number of hydrogen bonds found between specific base pairs in DNA. Between adenine (A) and thymine (T), there are two hydrogen bonds that stabilize this base pair. In contrast, cytosine (C) and guanine (G) form a base pair that is stabilized by three hydrogen bonds. These pairing rules are consistent across all DNA molecules, maintaining the double helix structure's uniformity and strength.