Two strands of DNA is/are held by:
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.
Glycosidic bond
Hydrogen bond
Covalent bond
Ionic bond