Which set correctly lists the four nitrogenous bases found in RNA?

• A. Adenine, uracil, cytosine, thymine
• B. Adenine, uracil, cytosine, guanine
• C. Adenine, thymine, cytosine, guanine
• D. Uracil, thymine, cytosine, guanine

Answer: (B)

Verified step by step guidance

1. Recall that RNA (ribonucleic acid) is a nucleic acid composed of a sugar-phosphate backbone and nitrogenous bases attached to the sugar.
2. Identify the four nitrogenous bases found in RNA. These bases are divided into two categories: purines and pyrimidines.
3. Remember that in RNA, the purine bases are adenine (A) and guanine (G), and the pyrimidine bases are cytosine (C) and uracil (U).
4. Note that thymine (T) is found in DNA, not RNA. In RNA, uracil replaces thymine.
5. Therefore, the correct set of nitrogenous bases in RNA is adenine, uracil, cytosine, and guanine.