- A Peptide bond
- B Glycosidic bond
- C Phosphodiester bond
- D Hydrogen bond
Correct answer: C. Phosphodiester bond
Explanation: Phosphodiester bonds link the 3' carbon of one nucleotide to the 5' phosphate of the next, forming the sugar-phosphate backbone of DNA and RNA.
Concept context
Carbohydrates, proteins, lipids, nucleic acids, and enzyme kinetics. Essential foundation for understanding metabolism.