Multiple Choice
Unlike DNA, RNA contains which nitrogenous base?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
Which set of nitrogenous bases is found in RNA?
A
Adenine, thymine, cytosine, and guanine
B
Adenine, uracil, thymine, and guanine
C
Adenine, uracil, cytosine, and guanine
D
Uracil, cytosine, thymine, and guanine
Verified step by step guidance1
Recall that nucleic acids DNA and RNA are composed of nitrogenous bases, sugars, and phosphate groups. The key difference between DNA and RNA lies in the nitrogenous bases they contain.
Identify the four nitrogenous bases found in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G).
Recognize that in RNA, thymine (T) is replaced by uracil (U), so the bases are adenine (A), uracil (U), cytosine (C), and guanine (G).
Understand that the presence of uracil instead of thymine is a defining feature of RNA, which helps distinguish it from DNA.
Therefore, the correct set of nitrogenous bases found in RNA is adenine, uracil, cytosine, and guanine.
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