Nucleic acid is the type of biomacromolecule that contains paired bases. Thus, the correct option is D.
Biomacromolecules may be defined as those molecules which are formed from the grouping of monomeric units such as proteins via amino acids, nucleic acids via nucleotides, carbohydrates via monosaccharides, etc.
Nucleic acids are the fundamental units of double-stranded nucleic acids comprised of two nucleobases bound to each other via hydrogen bonds.
Therefore, the correct option is D.
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