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

Question

Quizplus · Accepted Answer

Amino acids in water do not exist in an un-ionized form at any pH because they have both acidic (carboxyl) and basic (amino) groups that can ionize, forming zwitterions.

Which of the Following Is True of Amino Acids That