객관식
Which set correctly lists the four nitrogenous bases found in DNA?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the structure of DNA, which pentose sugar is present in the nucleotide backbone?
A
fructose
B
glucose
C
ribose
D
2-deoxyribose
검증된 단계별 안내1
Recall that DNA stands for deoxyribonucleic acid, which indicates the type of sugar present in its nucleotides.
Understand that nucleotides in DNA consist of three components: a phosphate group, a nitrogenous base, and a pentose sugar.
Identify that the pentose sugar in DNA is a five-carbon sugar lacking one oxygen atom compared to ribose, hence called 2-deoxyribose.
Contrast this with RNA, which contains ribose as its pentose sugar, having an -OH group on the 2' carbon.
Conclude that the pentose sugar in the DNA backbone is 2-deoxyribose, not fructose or glucose, which are not components of nucleic acid backbones.
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