In the double-stranded dna molecule, base pairs between two strands are linked by
a. phosphodiester bonds
b. hydrogen bonds
c. ionic bonds
d. peptide bonds
e. van der waals interactions

B. Hydrogen bonds

Explanation:

Hydrogen bonds are the weak attractive bonds that are formed between a partially positive hydrogen atom and an electronegative atom carrying a partial negative charge.

The nitrogenous bases of two strands of a DNA double helix are held together by hydrogen bonds. Adenine forms two hydrogen bonds with thymine base while guanine forms three hydrogen bonds with cytosine base.

These hydrogen bonds between the complementary nitrogenous bases of a double helix hold the two strands of DNA together.

answer: the answer is b

thinking it would be d not too sure but i think it's right