Asked in PMC Practice Test 24 (2021) 2021

In an alkaline medium, amino acids carry a negative charge and act as _.

Correct answer: A. Acid

  • A. Acid
  • B. Base
  • C. Neutral
  • D. None of these

Explanation

The following question requires the candidate to have the basic knowledge of the structue of amino acid and it's behavior in Alkaline/Basic medium. When, Amino acid is dissolved in an Alkaline solution, it donates an proton from it's Carboxylic acid and since it donates proton, it acts as an Acid. As a result, option 'A' is to be marked correct. The following image contains the behavior of Amino acid in Acidic and Alkaline medium:

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