Nitrogenous bases do not contain

Options

A. Carbon
B. Phosphrus
C. Hydrogen
D. Nitrogen

Answer

**Step-by-Step Solution:**

1. **Understanding Nitrogenous Bases**:
- Nitrogenous bases are organic compounds that contain nitrogen and exhibit basic properties. They are fundamental components of nucleic acids like DNA and RNA.

2. **Identifying the Elements Present**:
- The primary elements found in nitrogenous bases are:
- Nitrogen (N)
- Carbon (C)
- Hydrogen (H)
- Sometimes, oxygen (O) can also be present in certain nitrogenous bases.

3. **Analyzing the Options**:
- Now, we need to evaluate the options provided in the question to identify which element is not present in nitrogenous bases.
- Option A: Carbon - This is incorrect because carbon is indeed present in nitrogenous bases.
- Option B: Phosphorus - This is the correct answer because phosphorus is not a component of nitrogenous bases.

4. **Conclusion**:
- Based on the analysis, the element that is not present in nitrogenous bases is **Phosphorus**.

**Final Answer**: Phosphorus is not present in nitrogenous bases.

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