Nitrogen base seen in lecithin is

Options

A. Ethanol amine
B. Serine
C. Choline
D. Sphingosine

Answer

To determine the nitrogen base seen in lecithin, let's analyze the options provided:

1. **Understanding Lecithin**: Lecithin is a type of phospholipid, specifically known as phosphatidylcholine. It is composed of a glycerol backbone, two fatty acids, a phosphate group, and a nitrogenous base.

2. **Identifying the Options**: The options given are:
- Option 1: Ethanolamine
- Option 2: Serine
- Option 3: Choline
- Option 4: Sphingosine

3. **Analyzing Each Option**:
- **Ethanolamine**: This is an organic molecule that contains an amino group but is not a nitrogenous base in the context of lecithin.
- **Serine**: This is an amino acid and does not qualify as a nitrogenous base related to lecithin.
- **Choline**: This is a quaternary ammonium compound and contains nitrogen. It is indeed a nitrogenous base and is a key component of lecithin.
- **Sphingosine**: This is a backbone for sphingolipids and does not qualify as a nitrogenous base in lecithin.

4. **Conclusion**: Among the options, choline is the only nitrogenous base present in lecithin. Therefore, the correct answer is **Option 3: Choline**.