What is a zwitterion?

At pH 1, what is the predominant form of the amino group in an amino acid?

At pH 7, what is the protonation state of the carboxyl group in an amino acid?

Using a graph of pH versus concentration, how would you identify the zwitterionic form of an amino acid?

In a biochemical experiment, an amino acid is placed in a solution with a pH of 10. What is the expected charge on the amino group?

Given a pKa of 2 for the carboxyl group and 9 for the amino group, what is the net charge of an amino acid at pH 1?

If the pH of a solution is 8, what is the predominant form of the amino group in an amino acid with a pKa of 9?