A) Purine, pyrimidine and phosphate
B) Purine, sugar and phosphate
C) Nitrogen base, sugar and phosphate
D) Pyrimidine, sugar and phosphate
Correct Answer: C
Solution :
[c] The nucleic acid (DNA and RNA) are repeating units of nucleotides i.e. polynucleotides. Each nucleotide comprises of nitrogenous heterocyclic bases viz. purines or pyrimidines, pentose sugar and phosphoric acid.
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