Question

Phospholipids are made up of :

• A. fatty acids
• B. glycerol (or) any other alcohol
• C. nitrogenous base and phosphoric acid
• D. All the above

Answer 1

The correct option is D All the above

Phospholipids are made up of fatty acids, glycerol (or) any other alcohol (polar molecule), a nitrogenous base and phosphoric acid.

The phosphate group and polar head region of the molecule are hydrophilic (attracted to water), while the fatty acid tail is hydrophobic (repelled by water).

When placed in water, phospholipids will orient themselves into a bilayer in which the non-polar tail region faces the inner area of the bilayer. The polar head region faces outward and interacts with the water.

Hence, the correct option is $\text{D}$