Multiple Choice
In the structure of DNA, what type of bonds hold the base pairs together?
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7. DNA and Chromosome Structure
DNA Structure
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Which of the following nitrogenous bases is found in DNA but not in RNA?
A
Thymine
B
Adenine
C
Uracil
D
Guanine
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).
Compare the bases in DNA and RNA to identify which base is unique to DNA and not present in RNA.
Note that Uracil (U) replaces Thymine (T) in RNA, so Uracil is found in RNA but not in DNA.
Conclude that Thymine (T) is the nitrogenous base found in DNA but not in RNA.
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