Answer:
<u>Double bonds in the fatty acid tail</u> is the characteristic of a phospholipid contributes to the fluidity of the membrane .
Explanation:
Phospholipid -
The phospholipid has a hydrophobic region or the water hating , and is a non - polar region , hence , it can interact with the non - polar molecules in a chemical reaction .
And phospholipid has a hydrophilic region or the water loving , and is a polar region , hence , this region can form hydrogen bond with water .
Hence ,
When , a phospholipid is placed in water , it forms a ball or a cluster .
The two hydrophobic tails and the hydrophilic head together forms a phospholipid molecule .
The hydrophilic region have a phosphate-containing group which is attached to the glycerol molecule and the hydrophobic tails have unsaturated fatty acid and are the long chain hydrocarbon .
