A sample of RNA is sequenced and found to contain 22% adenine. Which of the
BIOLOGY
SAT 2021
A sample of RNA is sequenced and found to contain 22% adenine. Which of the following conclusions can also be drawn about the sample?
- A. The sample contains 22% thymine.
- B. The sample contains 28% thymine.
- C. The sample contains 22% uracil.
- D. The sample contains 28% uracil
Correct Answer: C. The sample contains 22% uracil.
Explanation
In RNA, the nucleic acid base adenine pairs with uracil. (In DNA, it pairs with thymine). In both RNA and DNA, cytosine pairs with guanine. Accordingly, RNA will have the same percent uracil as it does adenine
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