What are the two categories of nitrogenous bases?

Study for the DNA Structure, Replication, Transcription and Translation Test with flashcards and multiple choice questions. Each question offers hints and explanations. Prepare thoroughly and excel in your exam!

Multiple Choice

What are the two categories of nitrogenous bases?

Explanation:
Nitrogenous bases in nucleic acids are grouped into two families based on their ring structures: purines and pyrimidines. Purines have a two-ring structure and include adenine and guanine. Pyrimidines have a single six-member ring and include cytosine, thymine (in DNA), and uracil (in RNA). This two-category classification is what the question is asking for. The other terms refer to individual bases or to the sugar components, and don’t describe the two-group division.

Nitrogenous bases in nucleic acids are grouped into two families based on their ring structures: purines and pyrimidines. Purines have a two-ring structure and include adenine and guanine. Pyrimidines have a single six-member ring and include cytosine, thymine (in DNA), and uracil (in RNA). This two-category classification is what the question is asking for. The other terms refer to individual bases or to the sugar components, and don’t describe the two-group division.

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