Multiple Choice
How does the structure of DNA differ from that of RNA?
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14. DNA Synthesis
Discovering the Structure of DNA
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Which feature is found only in DNA and not in RNA?
A
Uracil as a nitrogenous base
B
Single-stranded structure
C
Thymine as a nitrogenous base
D
Ribose sugar in the backbone
Verified step by step guidance1
Understand the basic structure of nucleic acids: DNA and RNA are both nucleic acids composed of nucleotides, which include a sugar, a phosphate group, and a nitrogenous base.
Identify the sugars present in the backbone of DNA and RNA: DNA contains deoxyribose sugar, while RNA contains ribose sugar.
Examine the nitrogenous bases: DNA contains adenine, guanine, cytosine, and thymine. RNA contains adenine, guanine, cytosine, and uracil.
Recognize the structural differences: DNA is typically double-stranded, forming a double helix, whereas RNA is usually single-stranded.
Determine the unique feature of DNA: Thymine is a nitrogenous base found only in DNA, not in RNA, which uses uracil instead.
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