Which of the following bond is not present in DNA double helix ? (A) Hydrogen bond (B) Peptide bond (C) Glycosidic bond (D) Phosphodiester bond
Which of the following bond is not present in DNA double helix ? (A) Hydrogen bond (B) Peptide bond (C) Glycosidic bond (D) Phosphodiester bond

(B) Peptide bond

Explanation: A nitrogenous base, phosphate, and sugar make up DNA. It contains deoxyribose sugar, which has hydrogen at the second carbon position. The glycosidic bond connects the sugar to the nitrogenous base at the first carbon.