Biological Membrane or Plasma Membrane or Biomembrane (Zoology students Edition)UG,PG

Biological Membrane or Plasma membrane or Biological Membrane:

 

• Bio-Membrane (or Cell Membrane or Biological Membrane or Plasma Membrane) is a selectively permeable membrane which separates the cell internals from the external environment.  
• The Biological membrane also creates the compartment with in the cell organelles from damaging itself. Which acts as a boundary between each organelles of the cells.
  
• In eukaryotic cells, the cell membrane or Biological Membrane is made up of 'Phospholipid Bilayer' ,Whereas the biological membrane in prokaryotic cell is made up of protein and carbohydrate. The compound is peptidoglycan or Mucopeptide.

• In eukaryotic cell the Biological Membrane are made up of Phospholipid bilayer which is selectively permeable membrane.
• The phospholipid bilayer is a polar membrane consists of two layers, There are  
• Inner lipid layer and 
• Outer lipid layer.

• The phospholipid are comprise the polar head and Non polar tail like structure embed inside.
• The Biological membrane or phospholipid bilayer contains proteins with them they are
• Integral proteins and 
• peripheral protein.

INTEGRAL PROTEIN;

• The integral protein are the type of protein which is permanently attached to the biological membrane and responsible for transfer of macro molecules. (Eg; Glucose)
• The integral protein is cannot be breakdown by any food molecules or enzymes unless the cell goes to apoptosis.

PERIPHERAL PROTEIN;

• The peripheral proteins are temporary protein attached to the phospholipid bilayer and creates asymmetry in layer. These asymmetry helps for cell signaling . 
• These peripheral protein acts as a catalysts , enzymes, etc.