Which of the following is a structural subunit of DNA?
A
Carbohydrate
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B
Nucleotides
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C
Protein
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D
RNA
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Solution
The correct option is B
Nucleotides
Nucleotides make up the structural subunit of DNA, which in turn makes three subunits - a phosphate group, a 5-carbon sugar (deoxyribose) and a nitrogen base.