As per the fluid mosaic model, how are phospholipid molecules arranged in a lipid bilayer?

Step-by-step solution

According to the fluid mosaic model proposed by Singer and Nicolson, the major lipids are phospholipids that are arranged in a bilayer. Also, the lipids are arranged within the membrane with the polar head towards the outer sides and the hydrophobic tails towards the inner part. This ensures that the nonpolar tail of saturated hydrocarbons is protected from the aqueous environment.