Question

In nucleic acids, the nucleotides are linked together by

• A. Peptide bond
• B. Phosphodiester bond
• C. Glycosidic bond
• D. Hydrogen bond

Hint:

Phosphodiester bonds form the backbone of DNA, linking nucleotides through phosphate groups.

Answer 1

The Correct Option is B

Step 1: Definition:
Nucleotides in nucleic acids (DNA/RNA) are linked by phosphodiester bonds between sugar and phosphate groups. \[ \text{DNA Backbone:} -\text{Sugar}-\text{Phosphate}-\text{Sugar}- \] Step 2: Why not other options:
- Peptide bond: Found in proteins.
- Glycosidic bond: Links sugars in carbohydrates.
- Hydrogen bond: Stabilizes base pairing in DNA.