What is an amino acid and how do they make up proteins?
An amino acid is a molecule (compound) that has a backbone with an amino-end
To form a peptide a few amino acids are coupled together. To form a protein a whole string of amino acids is formed and later folded.
The coupling of amino acids is a condensation reaction i.e. water is released. The image below shows this reaction. The bond between two amino acids is called a peptide bond .