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Q.
The nitrogenous bases of the two strands of DNA are joined by
Biomolecules
Solution:
Hydrogen bond : The bond formed between two polynucleotide strands of DNA.
Glycosidic bond : Formed between the two monosaccharides (sugar).
Peptide bond : Formed between $2$ amino acids.
Phosphodiester bond : Bond formed in nucleic acid i.e. DNA or DNA, between the phosphate and hydroxyl group of sugar