Which is a pyrimidine?

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 $9.99Unlock all

Study for the DAT Bootcamp Molecular Genetics Test. Enhance your knowledge with flashcards and multiple-choice questions, each offering hints and explanations. Prepare effectively for your exam!

Multiple Choice

Which is a pyrimidine?

Explanation:
Pyrimidines are single-ring nitrogenous bases, while purines have two rings. Among the bases listed, adenine and guanine are purines, whereas cytosine and uracil are pyrimidines. In DNA, cytosine pairs with guanine and thymine is the pyrimidine; in RNA, uracil takes the place of thymine but remains a pyrimidine. So cytosine is a pyrimidine, and uracil is as well, which is why cytosine is identified as a pyrimidine in this context. The key idea is recognizing single-ring versus double-ring structures to distinguish pyrimidines from purines.

Pyrimidines are single-ring nitrogenous bases, while purines have two rings. Among the bases listed, adenine and guanine are purines, whereas cytosine and uracil are pyrimidines. In DNA, cytosine pairs with guanine and thymine is the pyrimidine; in RNA, uracil takes the place of thymine but remains a pyrimidine. So cytosine is a pyrimidine, and uracil is as well, which is why cytosine is identified as a pyrimidine in this context. The key idea is recognizing single-ring versus double-ring structures to distinguish pyrimidines from purines.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy