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Question

Sodium Dodecyl Sulphate (SDS) is used while separating proteins by polyacrylamide.Gel electrophoresis because



Your Answer
A

It helps in solubilization of proteins thereby making it easier to separate

Correct Answer
B

It binds to proteins and confers uniform negative charge density thereby making them move during electrophoresis

Your Answer
C

Decreases the surface tension of the buffer used for electrophoresis

Your Answer
D

Stabilizes the proteins


Solution

The correct option is C

It binds to proteins and confers uniform negative charge density thereby making them move during electrophoresis


As with all forms of gel electrophoresis, molecules may be run in their native state, preserving the molecules' higher-order structure, or a chemical denaturant may be added to remove this structure and turn the molecule into an unstructured linear chain whose mobility depends only on its length and mass-to-charge ratio. For proteins, sodium dodecyl sulfate (SDS) is an anionic detergent applied to protein sample to linearize proteins and to impart a negative charge to linearized proteins

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