Question

which is released during the formation of a peptide bond?
o a five - carbon sugar
o an amino group
o an amino acid
o a water molecule

Explanation:

When amino acids form a peptide bond, it is a condensation reaction. In this reaction, the carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH₂) of another amino acid. A water molecule ($H_2O$) is released as a by - product. A five - carbon sugar is not involved in peptide bond formation. An amino group is part of the reactants (amino acids) but is not released. An amino acid is a reactant in the formation of a peptide bond, not a product released.

Answer:

a water molecule