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
Process of Regeneration in Planarians Regeneration in planarians has been broadly studied and considerable information regarding this phenomenon is now available. Let us see w

Palynofossil s (Microfossils) - Fossils of planktons, diatoms, unicellular algae (diatoms) and shelled protozoans. (Heliozoans, Radiolarian and Foraminifera). Its finding in s

Q. Simplification and Selection of information of Consciousness? Simplification and Selection of information: There is much "editing" that goes on in the mind-from the first cu

Explain the Mechanisms suggested for bile acid adsorption? Mechanisms suggested for bile acid adsorption are: 1. Hydrophobic interactions between lignin and bile acids, 2

While waiting at an airport , nail Campbell once overheard this claim, its paranoid and ignorant to worry about industry or agriculture contaminating the environment with chemical

Explain the use of Enzyme assay Enzyme assay is also used for research into such processes as the browning of plant products which poses problems during value addition. The br

Laws Governing Ocular Movements Hering's Law of Equal Innervation states that equal and simultaneous innervation flows from the brain to yoke muscles in all binocular movement

difference between the respiration occurs in lower and higher organisms

Define Disadvantages of Direct Microscopic Count? 1. Small cells are difficult to see under the microscope and may be missed. 2. It gives total count, i.e., both live and de

what is relationship between numbers CPH in photon and frequency of photon? Answer; the photon contains n CPH and its energy is E=hν, when photons energy increases that the num