How many hydrogen bonds are formed between Guanine and Cytosine?

How many hydrogen bonds are formed between Guanine and Cytosine?

• A. 2
• B. 3
• C. 1
• D. 4

Answer: (B)

The correct number of hydrogen bonds formed between guanine and cytosine is three. This is a key aspect of nucleotide pairing in DNA. Guanine, which is a purine, pairs with cytosine, a pyrimidine, through specific hydrogen bonding interactions. The three hydrogen bonds provide stronger interactions between the base pairs compared to adenine and thymine, which only form two hydrogen bonds. This difference in bonding strength has important implications for the stability of the DNA double helix, influencing its structure and function during processes such as replication and transcription. Understanding these bonding interactions is crucial for grasping the molecular basis of genetics and biochemistry.

The correct number of hydrogen bonds formed between guanine and cytosine is three. This is a key aspect of nucleotide pairing in DNA. Guanine, which is a purine, pairs with cytosine, a pyrimidine, through specific hydrogen bonding interactions. The three hydrogen bonds provide stronger interactions between the base pairs compared to adenine and thymine, which only form two hydrogen bonds. This difference in bonding strength has important implications for the stability of the DNA double helix, influencing its structure and function during processes such as replication and transcription. Understanding these bonding interactions is crucial for grasping the molecular basis of genetics and biochemistry.