Reference no: EM132748005

1) Both glycine and alanine are amphoteric.

a. Explain the term amphoteric.

b. Explain the structural features of both glycine and alanine that enable them to be amphoteric.

c. i) Amino acids form zwitterions. Using glycine as an example, explain the term zwitterion.

ii) State and explain two physical properties of amino acids that can be explained by the existence of zwitterions.

d. Draw the two different dipeptides that can be formed when alanine and glycine react together through a condensation reaction.

2) a. What is the other name for the peptide link between two amino acids? Which functional group is responsible for this name?

b. How is ethanamide made? Give the equation for this reaction.

c. How is a substituted amide formed? Write the equation for this reaction.

d. How are substituted amides named? Explain with an example.