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
The patient will appear anxious and dyspnoeic. Patients in chronic heart failure are usually malnourished and even cachectic. Chronic passive venous congestion may produce exophtha

What is consanguineal marriage? Why is the appearing of genetic disease more probable in the offspring of a consanguineal marriage? The Consanguineal marriage is the marriage b

Concerning their biological function what is the difference between DNA and RNA? DNA is the source of information for RNA production (transcription) and therefore for protein s


Define symptoms in Stomach and Mouth of pernicious anaemia? Stomach: The cells which secrete acid and enzymes are atrophied. The gastric secretions are devoid of acid, pepsin

Define Vitamins requirement to avoid underweight problem? Vitamins and Minerals: If the diet provides good amounts of fresh fruits and vegetables, vitamin or mineral supplement

Plot the data as a suitable graph. Join the points with the best-fitting smooth curve.Temperature oC(5,10,11,13,17,19) Time taken for eggs to hatch/h 230 90 70 30 25

Industrial melanism refers to the dark pigmentation that evolved in some insects giving them protective coloration on vegetation darkened by soot in heavily industrialized areas pr

What is the functional unity of the kidneys? The functional (filtering) unity of the kidneys is the nephron. A nephron is made of afferent arteriole, efferent arteriole, glomer

Prophylaxis Many experts recommend that sexually assaulted adults and adolescents be given treatment to prevent sexually transmitted infections, including therapy for gonorrhea