In DNA, which base is paired with the base adenine?

In DNA, which base is paired with the base adenine?

• A. Thymine
• B. Guanine
• C. Cytosine
• D. Uracil

Answer: (A)

In DNA, adenine pairs with thymine through two hydrogen bonds. This pairing is a fundamental aspect of the structure of DNA, known as complementary base pairing, which ensures the accurate replication of genetic information during cell division. The specific pairing between adenine and thymine is crucial for maintaining the double helix structure of DNA. Guanine and cytosine, while both important bases in DNA and paired together, do not interact with adenine. Similarly, uracil is found in RNA instead of DNA; it replaces thymine in the RNA structure. Therefore, the correct base pairing for adenine in the context of DNA is with thymine, which maintains the integrity and stability of the genetic material.

In DNA, adenine pairs with thymine through two hydrogen bonds. This pairing is a fundamental aspect of the structure of DNA, known as complementary base pairing, which ensures the accurate replication of genetic information during cell division. The specific pairing between adenine and thymine is crucial for maintaining the double helix structure of DNA.

Guanine and cytosine, while both important bases in DNA and paired together, do not interact with adenine. Similarly, uracil is found in RNA instead of DNA; it replaces thymine in the RNA structure. Therefore, the correct base pairing for adenine in the context of DNA is with thymine, which maintains the integrity and stability of the genetic material.