Glycylalanine has how many peptide linkages:
Correct answer: A. One
- A. One
- B. Two
- C. Three
- D. None
Explanation
The term 'dipeptide' indicates that the molecule is composed of two amino acids linked by a single peptide bond. In glycylalanine, glycine and alanine are joined through the formation of a peptide linkage, which involves the removal of a water molecule (a process called condensation). This results in only one peptide linkage. Options suggesting more than one peptide linkage are incorrect because they imply additional amino acids or bonds that do not exist in a simple dipeptide. Option D is incorrect because a dipeptide must have at least one peptide bond.
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