Which of the following statement is not correct?

Options

A. Except glycine all other naturally occuring a-amino acids are optically active
B. `alpha`-amino acids have maximum solubility at their isoelectric point
C. A tripetide has two peptide bonds
D. `alpha` amino acids exist as Zwitter ions

Answer

B

Explanation

`alpha`-amino acids have minimum solubility at their isoelectric point.