Question

Two strands of DNA are held together by _____________.

• A. Peptide bonds
• B. Phosphodiester bonds
• C. S- S bonds
• D. Hydrogen bonds

Answer 1

The correct option is D Hydrogen bonds

Answer is option D i.e. "Hydrogen bonds"

The hydrogen bonds are formed between the base pairs of the anti-parallel strands. Base pairs are the building blocks of the DNA double helix. Base pairs consists of two nucleotide bases bound to each other by hydrogen bonds. The DNA helix is stable because of the base pairs that stack over one another and hydrogen bonds that hold the bases together.

Hence, answer is "Hydrogen bonds"