Two strands of DNA is/are held by:: (A) Glycosidic bond, (B) Hydrogen bond, (C) Covalent bond, (D) Ionic bond
Answer is B. Answer( b) hydrogen bond The two strands are held together by hydrogen bond formed by complementary base pairs" (Satyanarayan 4th/75)"The base pairs are held together by hydrogen bonds: two between A and T and three between G and C. These hydrogen bonds, plus the hydrophobic interactions between the stacked bases, stabilize the structure of the double helix.