MDCAT Chemistry MCQ #4883

In an electrophoresis experiment, an amino acid does not migrate toward either electrode at a specific pH. What is its structural state?

MDCAT Chemistry MCQ #4883

  1. Question 1

    Q1. In an electrophoresis experiment, an amino acid does not migrate toward either electrode at a specific pH. What is its structural state?

    • A) Anionic form
    • B) Zwitterion form
    • C) Cationic form
    • D) Non-polar form

    Answer: Zwitterion form

    Explanation: At the isoelectric point, amino acids exist as dipolar zwitterions with zero net charge. The acidic form is tempting but occurs at low pH.