A peptide synthesized by the reactions of one molecule each of Glycine, Leucine, Aspartic acid and H — Biomolecules Chemistry Question

💡 Solution & Explanation

**Step 1: Identify what forms peptide linkages** Peptide linkages are covalent bonds formed between the carboxyl group (-COOH) of one amino acid and the amino group (-NH₂) of another amino acid. **Step 2: Apply the formula for peptide linkages** For a peptide chain made from n amino acids: Number of peptide linkages = n - 1 **Step 3: Count the amino acids** The peptide is synthesized from: - 1 Glycine - 1 Leucine - 1 Aspartic acid - 1 Histidine Total amino acids (n) = 4 **Step 4: Calculate peptide linkages** Number of peptide linkages = 4 - 1 = 3 **Step 5: Verify the logic** When 4 amino acids link together in a chain, the first amino acid connects to the second (1 bond), the second to the third (1 bond), and the third to the fourth (1 bond). This creates 3 peptide linkages total, leaving one free carboxyl group and one free amino group at the chain ends. Therefore, the answer is 3.00.