In a Biochemistry Laboratory a Student Added Ammonium Sulfate to a Tube

question 27

Multiple Choice

In a biochemistry laboratory a student added ammonium sulfate to a tube containing a buffered protein solution. The student then centrifuged the solution. What was the student probably trying to do?

• A) change the pH of the buffer solution to solubilize all proteins
• B) hydrolyze the proteins into their constituent amino acids to determine the percent composition
• C) derivatize the N-terminal amino acid of all proteins
• D) selectively precipitate and purify a certain protein

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Definitions:

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