Concept:
Proteins are complex biomolecules made up of long chains of amino acids linked by peptide bonds. When proteins are broken down chemically, these peptide bonds are cleaved.
Explanation:
Hydrolysis involves breaking bonds using water (acidic, basic, or enzymatic conditions).
During hydrolysis, peptide bonds in proteins are broken.
This releases individual amino acid units.
Reaction Representation:
\[
\text{Protein} + H_2O \xrightarrow{\text{Hydrolysis}} \text{Amino acids}
\]
Conclusion:
Since proteins are polymers of amino acids, their complete hydrolysis yields amino acids.
\[
\boxed{\text{Answer: Amino acids}}
\]