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BIO NMDCAT Proteins
nmdcat.online June 29, 2026

The formation of a peptide bond between two amino acids is a classic example of a condensation reaction, where the new bond is formed with the simultaneous release of

A. A molecule of carbon dioxide
B. A molecule of ammonia
C. A molecule of water
✓
D. A phosphate ion

📝 Explanation

Peptide bond formation is a dehydration synthesis. The carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH₂) of another, releasing a water molecule (H₂O) and forming a covalent amide linkage (-CO-NH-).

📖 Additional Information

  • A molecule of carbon dioxide
  • A molecule of ammonia
  • A molecule of water
  • A phosphate ion

Peptide bond formation is a dehydration synthesis. The carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH₂) of another, releasing a water molecule (H₂O) and forming a covalent amide linkage (-CO-NH-).

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