Multiple Choice
In RNA, which pentose sugar is found in the backbone of the nucleotides?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In RNA base pairing, which nucleotide is complementary to adenine (A)?
A
Uracil (U)
B
Thymine (T)
C
Cytosine (C)
D
Guanine (G)
Verified step by step guidance1
Understand that RNA base pairing follows specific complementary rules, similar to DNA but with one key difference: RNA contains uracil (U) instead of thymine (T).
Recall that in DNA, adenine (A) pairs with thymine (T), but in RNA, thymine is replaced by uracil (U).
Identify that adenine (A) in RNA pairs with uracil (U) through hydrogen bonding.
Recognize that cytosine (C) pairs with guanine (G) in both DNA and RNA, so these are not complementary to adenine.
Conclude that the nucleotide complementary to adenine (A) in RNA is uracil (U).
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