Multiple choice

Which of the following is not an example of simple protein?

  1. Albumin

  2. Globulin

  3. Glutelin

  4. Casein
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Casein is a phosphoprotein, not a simple protein. Simple proteins (albumins, globulins, glutelins) yield only amino acids on hydrolysis. Casein contains phosphate groups, making it a conjugated protein. This distinction is based on chemical composition after hydrolysis.

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