Difficulty: Medium
Average Score: 80%
Entry Exam
Which of the following is not an RNA base?
Correct answer
B
Rationale
In RNA, the bases are Adenine, Uracil, and Cytosine. Thymine is uniquely found in DNA and not RNA. Adenine pairs with Uracil, while Cytosine pairs with Guanine in RNA. Thus, Thymine is not an RNA base, making it the correct answer.