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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.

1. Nucleic acids are made of amino acids.
2. Nucleic acids are made of nucleotides.
3. Nucleic acids are made of fatty acids.
4. Nucleic acids are made of carbohydrates.

Correct answer: Nucleic acids are made of nucleotides.

Solution

DNA and RNA are polymers whose repeating monomer units are nucleotides. Each nucleotide contains a nitrogenous base, a pentose sugar, and a phosphate group, so the correct statement is that nucleic acids are made of nucleotides.

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