Question

How many layers is the lipid bilayer?


How many layers is the lipid bilayer?

1

2

3

4

Answer 1

The lipid bilayer consists of 2 layers of lipid molecules. Each layer is made up of phospholipids arranged such that their hydrophilic (water-attracting) heads face outward towards the water, while their hydrophobic (water-repelling) tails face inward, away from the water. Therefore, the correct answer is **2**.