Which base is a purine?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Study for the Biochemistry Module 6 Exam. Study with flashcards and multiple choice questions; each question includes hints and explanations. Gear up to ace your test!

Multiple Choice

Which base is a purine?

Explanation:
Purines and pyrimidines are the two classes of nucleobases. Purines, like adenine and guanine, have a bicyclic structure with two rings; pyrimidines, like cytosine, thymine, and uracil, have a single ring. Among the options, the base with the two-ring purine structure is adenine, which is why it is categorized as a purine. This structural difference also underlies how bases pair: purines pair with pyrimidines to keep the DNA or RNA backbone width consistent (adenine with thymine in DNA, adenine with uracil in RNA). So the base that is a purine is adenine.

Purines and pyrimidines are the two classes of nucleobases. Purines, like adenine and guanine, have a bicyclic structure with two rings; pyrimidines, like cytosine, thymine, and uracil, have a single ring. Among the options, the base with the two-ring purine structure is adenine, which is why it is categorized as a purine. This structural difference also underlies how bases pair: purines pair with pyrimidines to keep the DNA or RNA backbone width consistent (adenine with thymine in DNA, adenine with uracil in RNA). So the base that is a purine is adenine.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy