Question:
Which one of the following can form a nucleotide of DNA?
Which one of the following can form a nucleotide of DNA?
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Remember: DNA = deoxyribose + A, T, G, C; RNA = ribose + A, U, G, C.
Updated On: Mar 6, 2026
- Thymine + ribose + phosphate
- Uracil + ribose + phosphate
- Adenine + deoxyribose + phosphate
- Uracil + deoxyribose + phosphate
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The Correct Option is C
Solution and Explanation
Step 1: Structure of a DNA nucleotide.
A DNA nucleotide is composed of a nitrogenous base, deoxyribose sugar, and a phosphate group.
Step 2: Identifying correct components.
DNA contains adenine, guanine, cytosine, and thymine as bases.
The sugar present in DNA is deoxyribose, not ribose.
Step 3: Eliminating incorrect options.
Options containing ribose form RNA nucleotides.
Uracil is found in RNA, not DNA.
Step 4: Conclusion.
Adenine + deoxyribose + phosphate correctly forms a DNA nucleotide.
A DNA nucleotide is composed of a nitrogenous base, deoxyribose sugar, and a phosphate group.
Step 2: Identifying correct components.
DNA contains adenine, guanine, cytosine, and thymine as bases.
The sugar present in DNA is deoxyribose, not ribose.
Step 3: Eliminating incorrect options.
Options containing ribose form RNA nucleotides.
Uracil is found in RNA, not DNA.
Step 4: Conclusion.
Adenine + deoxyribose + phosphate correctly forms a DNA nucleotide.
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