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Chemical Constituents of Cells · NCERT Biology

Which of the following is NOT a characteristic of zwitterionic form of amino acids?

  1. It carries both positive and negative charges.
  2. It occurs at a specific pH called the isoelectric point.
  3. The amino group is protonated and the carboxyl group is deprotonated.
  4. The molecule moves toward the cathode in an electric field.
Show answer and explanation

Correct answer: The molecule moves toward the cathode in an electric field.

In its zwitterionic form, the net charge of the amino acid is zero. Therefore, it does not migrate toward either the anode or cathode in an electric field.

Difficulty: Medium Question 18 of 20

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