A fat molecule has three fatty acids. A Phos- pholipid molecule has how many fatty acids?

Options

A. 3
B. 2
C. 1
D. 0

Answer

To determine how many fatty acids are present in a phospholipid molecule, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Fat Molecules**:
- A fat molecule, also known as a triglyceride, is composed of three fatty acids attached to a glycerol molecule. This is the basic structure of fats.

2. **Identifying Phospholipid Structure**:
- Phospholipids are similar to fats but have a different structure. They are classified as diglycerides.

3. **Components of a Phospholipid**:
- In a phospholipid, there are two fatty acids attached to a glycerol molecule. This means that instead of three fatty acids like in triglycerides, phospholipids only have two.

4. **Role of the Third Position**:
- The third position on the glycerol molecule, which would typically be occupied by a fatty acid in triglycerides, is instead occupied by a phosphate group in phospholipids.

5. **Conclusion**:
- Therefore, a phospholipid molecule has **two fatty acids**.

### Final Answer:
A phospholipid molecule has **2 fatty acids**.

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