Unit membrane model, Biology

Unit Membrane Model

Lamellar model was supported by Robertson. According to Robertson -

  • All biomembrane have similar structure (like PM), on the basis of this observation put forward the concept of Unit membrane.
  • According to unit membrane concept - all biomembranes from prokaryotes to eukaryotes have similar trilamellar structure.

1526_unit membrane model.png

  • A unit membrane has a thickness of 75Å. (nuclear membrane thicker than 75Å) and made of 2 or more layer.
  • Each of 2 electron dense surface layers is 20Å thick, it is formed of extend or b-protein molecules.
  • Outer protein layer consists of mucoprotein. Inner protein layer consists of non-mucoprotein.
  • Central electron transparent layer is 35Å thick, which is c/o bimolecular layer of phospholipids.
  • Drawback of unit membrane model - This model also doesn't explain permeability & elasticity of PM.
Posted Date: 10/5/2012 6:26:53 AM | Location : United States







Related Discussions:- Unit membrane model, Assignment Help, Ask Question on Unit membrane model, Get Answer, Expert's Help, Unit membrane model Discussions

Write discussion on Unit membrane model
Your posts are moderated
Related Questions
What is homogenization Emulsions may also be stabilized by a process known as homogenization, in which the size of the dispersed fat globules is greatly reduced to more or less

#question.what are the reason that arthropodans are abundant in nature.


According to the Nernst equation, the equilibrium potential for any ion (Eion) distributed across a membrane is dependent on the internal (Ionin) and external (Ionout) concentratio

Determine the Nature and Degree of Abnormality The nature and degree of abnormality will effect normal neural growth and maturational outcome. For example, in an adult damage t

ANTIBIOTICS - Chemicals produced by microorganism that inhibit the growth of other microorganism. Such microorganism which produces the antibiotics are antibiont . Wh

Q. What is Lipid-lowering Trial? Aggressive lipid-lowering drug treatment of persons at various risk levels reduces Coronary Artery Disease morbidity and mortality rates and in

Composition of Oral Rehydration Salt (WHO Standard Formulation) 1. Sodium Chloride (common salt) = 3.5 g 2. Glucose = 20 g 3. Trisodium Citrate = 2.9 g or sodium bicarbon

P o x diseases Small-pox in human beings and pox in a few animal species are closely related to each other. It is shown by the fact that the vaccine for the prevention of sma

At 1 AM, a researcher places a healthy squid giant axon in a bath of normal squid physiological extracellular saline and internally perfuses the axon with normal squid intracellula