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
Effect on Microbial Growth and Ecology Redox potential exerts an important selective effect on the microflora of a food since it will decide the type of microorganism that can

what is the lungs structure in relation to the excretory system?

State the concept of Finger Tapping The subject is asked to tap his or her extended index finger on a typewriter key attached to a mechanical counter. Several series of 10-seco

Q. What do you mean by biodigester? A biodigester is equipment that produces hydrogen sulfide, carbon dioxide and fuel gases (biogases) like methane from organic material under

Multidrug Resistance  Treatment of MDRTB is  based on limited data; patients should be referred, if possible, to clinicians who have experience in treating such cases. MDRTB (r

Q. Zonation in the ocean? The oceans play a major role in determining the climate and sustaining life on earth. Oceans help to redistribute the solar energy, through ocean curr

State the Lantern Test  The patient names colours displayed in the lantern and the mistakes are analyzed. This is not the best method of testing because it depends on the natu

Cleavage - Metazoa The unicellular zygote begins cell division (cleavage). First, the single cell divides forming two cells, these redivide further to form four, then eight ce

How can the hemolytic disease of the newborn be prevented? The Erythroblastosis fetalis can be prevented if in the first delivery of a Rh+ child from a Rh- mother serum contain

Sphaerosome Also known as Plant lysosome , because they contain hydrolytic enzymes. Hanstei n first observed them and called microsomes . Discovered by Dangeared