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 a peptide bond forms between two amino acids, a dehydration synthesis reaction occurs. In this reaction, the carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH₂) of another amino acid. A water ($H_2O$) molecule is released as a by - product. The amino group and amino acid are reactants in the formation of the peptide bond, not released. A five - carbon sugar is not involved in peptide bond formation (peptide bonds are specific to amino acid polymerization).

Answer:

a water molecule