dna is a kind of nucleic acid
dna_polymerase is not nucleic_acid_polymerase. dna_polymerase is nucleic_acid_polymerase. nucleic_acid_molecule is polynucleotide. nucleic_acid is chemical_substance. nucleic_acid_molecule is nucleic_acid_molecule. dna_molecule is nucleic_acid_molecule. nucleic_acid_molecule is not polynucleotide. dna_molecule is not nucleic_acid_molecule.