Which base is found in RNA but not in DNA?

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 effectively for your Chemistry of Biology Test. Use flashcards, answer multiple-choice questions, and access hints with explanations. Prepare thoroughly for success!

Multiple Choice

Which base is found in RNA but not in DNA?

Explanation:
Uracil is the base found in RNA but not in DNA. RNA uses adenine, cytosine, guanine, and uracil, while DNA uses adenine, cytosine, guanine, and thymine. Uracil pairs with adenine in RNA, whereas thymine pairs with adenine in DNA. The extra methyl group on thymine helps stabilize DNA and aids repair systems in distinguishing cytosine’s deamination products. So uracil’s presence in RNA—and absence in DNA—is the key distinction.

Uracil is the base found in RNA but not in DNA. RNA uses adenine, cytosine, guanine, and uracil, while DNA uses adenine, cytosine, guanine, and thymine. Uracil pairs with adenine in RNA, whereas thymine pairs with adenine in DNA. The extra methyl group on thymine helps stabilize DNA and aids repair systems in distinguishing cytosine’s deamination products. So uracil’s presence in RNA—and absence in DNA—is the key distinction.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy