Multiple Choice
Which of the following is a procedure using membrane bags to separate molecules based on molecular size?
5. Protein Techniques
Dialysis
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Dialysis is a technique used to:
A
Remove salts from a protein solution.
B
Add salts to a protein solution.
C
Purify proteins from cell organelles.
D
Remove unwanted proteins.
Verified step by step guidance1
Understand the purpose of dialysis in biochemistry: Dialysis is a process used to separate molecules in solution based on their size through a semi-permeable membrane.
Recognize that dialysis is commonly used to remove small molecules, such as salts, from larger molecules like proteins.
Consider the options given: Removing salts from a protein solution aligns with the purpose of dialysis, as it allows small molecules to pass through the membrane while retaining larger molecules.
Evaluate the other options: Adding salts, purifying proteins from cell organelles, and removing unwanted proteins are not typical uses of dialysis.
Conclude that the primary function of dialysis in this context is to remove salts from a protein solution, as it effectively separates small solutes from larger macromolecules.
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