Your lab group is carrying out the Biuret test on various assigned solutions. When you come to proline, an amino acid, after you add the Biuret reagent, the solution appears blue. Your lab partners are puzzled by this result. How can you explain this result to them?Multiple ChoiceThis is a negative result because Biuret detects peptide bonds, and amino acids do not have peptide bonds.This is a positive result because Biuret detects amino acids.This is a positive result because Biuret detects proteins, and amino acids are components of protein.This is a positive result because Biuret detects amine functional groups, and amino acids possess these functional groups.