Which of the following lipids is found in the cell membrane.

Options

A. Lecithin
B. Palmitic acid
C. Arachidonic acid
D. Glycerol

Answer

To determine which lipid is found in the cell membrane, we can analyze the options provided:

1. **Understanding Cell Membrane Composition**:
- The cell membrane is primarily composed of a lipid bilayer, which includes various types of lipids and proteins. The main type of lipid found in the cell membrane is phospholipids.

2. **Identifying the Lipids**:
- **Lecithin**: This is a type of phospholipid that is commonly found in animal cell membranes. It plays a crucial role in forming the lipid bilayer.
- **Palmitic Acid**: This is a saturated fatty acid and is not a major component of cell membranes.
- **Arachidonic Acid**: This is a polyunsaturated fatty acid, which is involved in signaling but is not a structural component of the cell membrane.
- **Glycerol**: This is a backbone molecule for triglycerides and phospholipids but is not found in the membrane as a standalone lipid.

3. **Conclusion**:
- Among the given options, lecithin is the principal phospholipid found in animal cell membranes, making it the correct answer.

**Final Answer**: Lecithin

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