Which Type of Lipid is a Key Component of the Cell

Question

Which type of lipid is a key component of the cell membrane?
A) Steroid
B) Phospholipid
C) Triglyceride
D) Fatty acid

Accepted Answer

Phospholipids are a key component of the cell membrane because they have a hydrophilic (water-loving) head and a hydrophobic (water-hating) tail. The hydrophilic head faces the outside of the cell, while the hydrophobic tail faces the inside of the cell. This arrangement creates a barrier that prevents water from entering or leaving the cell.