What base pairs with adenine in the DNA molecule?

What base pairs with adenine in the DNA molecule?

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

Answer: (B)

In the DNA molecule, adenine specifically pairs with thymine through the formation of hydrogen bonds. This pairing is essential for the structure of DNA, as it creates complementary strands, which allows for accurate replication and transcription. Adenine, being a purine, has a double-ring structure, and thymine, a pyrimidine, has a single-ring structure. The combination of these two different structures helps maintain the uniform width of the DNA double helix. The pairing is due to the specific bonding patterns that allow for two hydrogen bonds to form between adenine and thymine. This adenine-thymine pairing is crucial for the stability of the DNA molecule and is a fundamental aspect of genetic information storage and transfer.

In the DNA molecule, adenine specifically pairs with thymine through the formation of hydrogen bonds. This pairing is essential for the structure of DNA, as it creates complementary strands, which allows for accurate replication and transcription. Adenine, being a purine, has a double-ring structure, and thymine, a pyrimidine, has a single-ring structure. The combination of these two different structures helps maintain the uniform width of the DNA double helix.

The pairing is due to the specific bonding patterns that allow for two hydrogen bonds to form between adenine and thymine. This adenine-thymine pairing is crucial for the stability of the DNA molecule and is a fundamental aspect of genetic information storage and transfer.