Multiple Choice
Which nitrogenous base is unique to RNA, and which is unique to DNA?
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7. DNA and Chromosome Structure
DNA Structure
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the context of DNA structure, which letter represents the sugar component in the nucleotide backbone?
A
N
B
A
C
G
D
D
Verified step by step guidance1
Recall the structure of a nucleotide, which consists of three components: a phosphate group, a sugar molecule, and a nitrogenous base.
Understand that in DNA, the sugar component is deoxyribose, which forms part of the backbone along with phosphate groups.
Recognize that the letters N, A, and G typically represent nitrogenous bases: N is not standard, A stands for adenine, and G stands for guanine.
Note that the sugar component is not represented by a letter like the bases; instead, it is often denoted as 'S' or simply referred to as the sugar in diagrams.
Therefore, identify that none of the letters N, A, or G represent the sugar component; the sugar is a distinct chemical structure, not symbolized by these letters.
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