Which of the following is true of amino acids dissolved in water?
A) They exist in un-ionized form at high pH.
B) They exist in un-ionized form at low pH.
C) They exist at un-ionized form only at the isoelectric point.
D) They do not exist in unionized form at any pH.

Question

Quizplus · Accepted Answer

Amino acids in water are always ionized due to their zwitterionic nature, with both positive and negative charges, and do not exist in an un-ionized form at any pH.

Which of the Following Is True of Amino Acids Dissolved