Multiple Choice
Which nitrogenous base is found in RNA but not in DNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In RNA, adenine (A) forms hydrogen bonds with which nitrogenous base during complementary base pairing?
A
Thymine (T)
B
Cytosine (C)
C
Uracil (U)
D
Guanine (G)
Verified step by step guidance1
Recall that in DNA, adenine (A) pairs with thymine (T) through complementary base pairing.
Understand that RNA differs from DNA in that it contains uracil (U) instead of thymine (T).
Recognize that during RNA base pairing, adenine (A) forms hydrogen bonds with uracil (U) instead of thymine.
Note that cytosine (C) pairs with guanine (G) in both DNA and RNA, so it is not the correct partner for adenine.
Therefore, the complementary base pairing for adenine in RNA is with uracil (U).
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