The number of peptide linkages in a tripeptide containing three amino acids is:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 2
A peptide linkage (–CO–NH–) forms when the –COOH group of one amino acid reacts with the –NH₂ group of another amino acid.
For a peptide with n amino acids, the number of peptide bonds formed is n − 1.
Here, in a tripeptide:
Number of amino acids = 3
Peptide linkages = 3 − 1 = 2
So, a tripeptide contains 2 peptide bonds.