Plovdiv Entrance Practice Test

Peptide bond is the bond between:

Amines and carbohydrates Alcohols and amino acids Carboxylic acids and amines Alpha-amino acids

Correct Answer:

Alpha-amino acids

Explanation:

A peptide bond is the covalent link that connects amino acids in a protein. It forms when the amino group of one amino acid reacts with the carboxyl group of another amino acid, releasing a molecule of water. The result is an amide linkage between two amino acids, so the bond is between alpha-amino acids. The other options point to general functional groups or different kinds of molecules, but they don’t specify the actual units being joined in a peptide bond—the units involved in this bond are amino acids themselves.

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