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  1. A nucleotide is formed of
    1. Purine, pyrimidine and phosphate
    2. Purine, sugar and phosphate
    3. Nitrogen base, sugar and phosphate
    4. Pyrimidine, sugar and phosphate
Correct Option: 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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