Lipid molecules (Phospholipids) are amphiatic. Each moleucle has

Answer

### Step-by-Step Solution:

1. **Understanding Amphipathic Molecules**:
- Amphipathic molecules are those that have both hydrophilic (water-loving) and hydrophobic (water-fearing) parts. This property is crucial for the formation of biological membranes.

2. **Identifying Phospholipids**:
- Phospholipids are a type of lipid molecule that are key components of the cell membrane. They consist of a glycerol backbone, two fatty acid tails, and a phosphate group.

3. **Structure of Phospholipids**:
- In a phospholipid, the head (which contains the phosphate group) is hydrophilic, meaning it interacts well with water.
- The two tails, which are made of fatty acids, are hydrophobic, meaning they do not interact well with water.

4. **Role in Cell Membrane**:
- The amphipathic nature of phospholipids allows them to form a bilayer in aqueous environments. The hydrophilic heads face outward towards the water, while the hydrophobic tails face inward, away from the water. This arrangement is essential for creating a barrier that separates the internal environment of the cell from the external environment.

5. **Conclusion**:
- Therefore, each phospholipid molecule has a hydrophilic head and two hydrophobic tails, which is why they are termed amphipathic.