Colloids

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1. Which of these will increase stabilization of a colloid particle?

  • Add a little salt (eg. increases solubility of globulins)
  • Adding the ionic strength by adding
  • Adding water soluble organic solvent (destroys the lyosphere)
  • Changing the Ph to its isoelectric point for amphoteric colloid particles like proteins
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Other questions in this quiz

2. Which purpose of the gel is correct?

  • polyacrylamind gel - electrophoretic separation of nucleic acids
  • Silica gel - chromatography, drying
  • Agarose gel - electrophoretic separation of protiens

3. In the venule end which type of pressure is higher?

  • Blood pressure > Oncotic pressure so tissue fluid leaves the cappillaries
  • Blood pressure < Oncotic pressure so tissue fluid returns back into the cappillaries
  • Blood pressure < Oncotic pressure so tissue fluid leaves the cappillaries
  • Blood pressure > Oncotic pressure so tissue fluid returns back into the cappillaries

4. what is a protective colloid?

  • proteins in the blood are protective colloids of Calcium phosphate and calcium carbonate leading to its precipitation (forming gall stones)
  • A protective colloid are substances that form a hydrophilic colloid solution stabilizing the hydrophobic colloid particles.
  • A stubstance that specifically stabilises emulsions eg glycocholic (facilate absorption of dietary lipids)
  • A protective colloid are substances that form a hydrophobic colloid solution stabilizing the hydrophillic colloid particles.

5. which of these is not a way to classify Colloids?

  • Mobility of coloids eg solutions (free in their motion as in a true solution) and gel (particles arranged in a solid net e.g fibrin gel, gelatine
  • Organic colloids - colloid particles (eg DNA, viruses, vesicles) or colloid systems(- blood plasma, lymph, cytosol)
  • Structure of colloid - Molecular (sungle large molecule eg. proteins/starch) or micellar (particles composed from smaller amphillic ones eg. soap/phospholipids
  • Interaction with water - hydrophobic and hydrophillic

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