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
Portal Hypertension: If you review the portal circulation you may recall that normal blood flow to and from the liver depends on proper functioning of  the portal vein, the he


Amphibians is the class of terrestrial vertebrates which lay their eggs (and mate) in water but live on land as adults following the juvenile stage where they live in water and br

Q. How do hormonal tests to detect pregnancy work? Laboratory tests to detect pregnancy commonly test for human chorionic gonadotropin (HCG) concentration in urine or blood sam

Q. Ecological Evidence of organisms to environment? Ecology is concerned with organisms in relationships to their environment. These relationships may be classified as biotic,

Q. What is represented by the cellular secretion? Cell secretion is the removal to the exterior of substances produced by the cell for instance, hormones, mucus, and sweat, so

Which of the following characteristics is not shared by typical birds and mammals? A) Four chambered heart B) Milk production C) Four limbs D) Endothermy E) Insulating skin structu

What is Subphylum Vertebrata explain? This large group of animals takes its name from its distinguishing feature: the vertebral column, or the backbone. The backbone made of se

Define the Drugs Effects on Excretion? Use of certain drugs can influence the excretion of certain substances. For example, besides their intended increase in sodium excretion,

Congenital Anomalies of Small and Large Intestines: 1) Intussusecption  Intussusecption  is the invagination or telescoping  of one part of  the intestine into another part