Question : The lipid molecules present in plasma membrane have polar heads and non-polar tails (as shown in figure). Which option represents the correct arrangement of lipids in lipid bilayer ?

Question : The lipid molecules present in plasma membrane have polar h

1.	Question : The lipid molecules present in plasma membrane have polar heads and non-polar tails (as shown in figure). Which option represents the correct arrangement of lipids in lipid bilayer ?
Answer» Solution :The lipid molecules are amphipathic, i.e., they posses both polar hydrophilic (water loving) and nonpolar hydrophobic (water repelling) ends. The hydrophilic region is in the form of a head occurring at outer surface while the hydrophobic PART contains TWO tails of fatty ACIDS. Hydrophobic tails usually occur towards the CENTRE of the membrane. It in the formation of a lipid bilayer. Most COMMON lipid in the bilayer is phospholipid.