Sulphur is not a structural component of:

Options

A. Methionine
B. Conenzyme A
C. Biotin
D. Aspartic acid

Answer

To solve the question of which compound does not contain sulfur as a structural component, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Sulfur**: Recognize that sulfur is an essential element for plants and is absorbed in the sulfate form (SO4²⁻). It plays a crucial role in various biological molecules.

**Hint**: Sulfur is absorbed by plants in a specific form. What is that form?

2. **Identify Sulfur-Containing Compounds**: Sulfur is a component of several important biological molecules, including:
- Amino acids: Cysteine and Methionine
- Vitamins: Thiamine and Biotin
- Coenzymes: Coenzyme A and Ferredoxin

**Hint**: Think about the types of molecules that commonly contain sulfur.

3. **Analyze the Options**: The question asks which of the given options does not contain sulfur. We need to check each option:
- **Methionine**: Contains sulfur.
- **Cysteine**: Contains sulfur.
- **Coenzyme A**: Contains sulfur.
- **Aspartic Acid**: Does not contain sulfur.

**Hint**: Compare each option to see if sulfur is a part of its structure.

4. **Conclusion**: Since Methionine, Cysteine, and Coenzyme A all contain sulfur, while Aspartic Acid does not, we conclude that the correct answer is Aspartic Acid.

**Hint**: Which option stands out as lacking sulfur?

### Final Answer:
Sulfur is not a structural component of **Aspartic Acid**.