Would you expect aspartame to yield apositive biuret test why or why not?

No, Aspartame would not yield a positive biuret test because it is a dipeptide composed of two amino acids (aspartic acid and phenylalanine) and does not contain a sufficient number of peptide bonds to react with the biuret reagent. The biuret test specifically detects the presence of peptide bonds in proteins or larger polypeptides, and since aspartame is a small molecule, it lacks the structural characteristics required for a positive result.