Multiple Choice
Which of the following best describes the typical structure of RNA molecules?
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7. DNA and Chromosome Structure
RNA
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Which of the following is a base that is found in RNA but not DNA?
A
Adenine
B
Thymine
C
Guanine
D
Uracil
Verified step by step guidance1
Recall the four nitrogenous bases found in DNA: adenine (A), thymine (T), cytosine (C), and guanine (G).
Recall the four nitrogenous bases found in RNA: adenine (A), uracil (U), cytosine (C), and guanine (G).
Note that thymine (T) is replaced by uracil (U) in RNA, meaning uracil is present in RNA but not in DNA.
Understand that adenine, guanine, and cytosine are common to both DNA and RNA, so they are not unique to RNA.
Therefore, identify uracil as the base found in RNA but not in DNA.
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