Which of the following is not a part of a nucleotide?

Options

A. Phosphate
B. Nitrogenous base
C. Fatty acid
D. Pentose sugar

Answer

To solve the question "Which of the following is not a part of a nucleotide?", we need to understand the components that make up a nucleotide.

### Step-by-Step Solution:

1. **Identify the Components of a Nucleotide**:
A nucleotide is the basic building block of nucleic acids (DNA and RNA). It consists of three main components:
- A phosphate group
- A nitrogenous base
- A pentose sugar (which can be ribose or deoxyribose)

2. **Analyze the Options**:
The options given are:
- Phosphate
- Nitrogenous base
- Fatty acid
- Pentose sugar

3. **Determine Which Option is Not a Part of a Nucleotide**:
- **Phosphate**: This is indeed a part of a nucleotide.
- **Nitrogenous Base**: This is also a part of a nucleotide.
- **Fatty Acid**: This is not a part of a nucleotide. Fatty acids are components of lipids, not nucleotides.
- **Pentose Sugar**: This is a part of a nucleotide.

4. **Conclusion**:
Since fatty acid is not a component of a nucleotide, the correct answer is **fatty acid**.

### Final Answer:
Fatty acid is not a part of a nucleotide.

---