Multiple Choice
Which nitrogenous base is found in RNA but not in DNA?
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7. DNA and Chromosome Structure
RNA
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Which of the following lists correctly identifies the nitrogenous bases found in RNA?
A
Adenine, Uracil, Cytosine, Guanine
B
Adenine, Uracil, Cytosine, Thymine
C
Adenine, Guanine, Thymine, Cytosine
D
Adenine, Thymine, Cytosine, 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 in bases between DNA and RNA lies in one of the pyrimidines.
List the four nitrogenous bases found in DNA: Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).
List the four nitrogenous bases found in RNA: Adenine (A), Uracil (U), Cytosine (C), and Guanine (G). Note that Uracil replaces Thymine in RNA.
Compare the options given with the RNA bases. The correct list must include Adenine, Uracil, Cytosine, and Guanine.
Identify the option that matches this list exactly, confirming it as the correct answer.
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