Unit 4

Question 1

2 most commonly used detergents

Answer 1

• SDS (sodium dodecyl sulfate) is a strong ionic detergent since it has an ionised group at its hydrophillic end
• Triton X-100 is a mild non-ionic detergent since it has a non-ionised but polar group at its hydrophillic end

Question 2

Membrane domains

Answer 2

• When membrane protein movement is restricted, they can form membrane domains
  A.) Between similar proteins to cause aggregation
  B.) Between the membrane protein and an extracellular protein
  C.) Between the membrane protein and the underlying, intracellular cytoskeleton
  D.) Between membrane proteins on the surface of 2 cells