A phospholipid molecule is amphipathic and produce two layers coming in contact with `H_(2)O`. The head of phospholipid molecule is

Options

A. at the periphery
B. towards the centre
C. at the angle of `40^(@)`
D. embendded in protein molecules

Answer

### Step-by-Step Solution:

1. **Understanding Phospholipids**: A phospholipid molecule consists of a hydrophilic (water-loving) head and two hydrophobic (water-hating) tails. This unique structure makes phospholipids amphipathic, meaning they have both hydrophilic and hydrophobic parts.

2. **Formation of Bilayer**: When phospholipids come into contact with water (H₂O), they arrange themselves into a bilayer. The hydrophilic heads face outward towards the water, while the hydrophobic tails face inward, away from the water.

3. **Position of the Head**: In the phospholipid bilayer, the hydrophilic heads are located at the periphery (outer edges) of the bilayer. This positioning allows them to interact with the aqueous environment, while the hydrophobic tails are shielded from the water.

4. **Conclusion**: Therefore, the head of the phospholipid molecule is at the periphery of the bilayer, facing the water, while the tails are embedded within the bilayer.

### Final Answer:
The head of the phospholipid molecule is hydrophilic and located at the periphery of the bilayer, facing the water.

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