Plants require sulphur for

Options

A. DNA replication
B. Protein synthesis
C. Glucose synthesis
D. ATP formation

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Sulfur in Plants:**
- Sulfur is an essential macronutrient for plants, playing a crucial role in various physiological processes.

2. **Analyzing the Options:**
- **Option 1: DNA replication** - While sulfur is important for many biological processes, it is not directly involved in DNA replication.
- **Option 2: Protein synthesis** - Sulfur is a key component of certain amino acids (like cysteine and methionine) that are essential for protein synthesis. Therefore, this option is highly relevant.
- **Option 3: Glucose synthesis** - Sulfur does not play a direct role in the synthesis of glucose.
- **Option 4: ATP formation** - Sulfur is not directly involved in ATP formation.

3. **Conclusion:**
- Based on the analysis, the most accurate answer is that plants require sulfur primarily for **protein synthesis**.

**Final Answer:**
- Plants require sulfur for **protein synthesis** (Option 2).

---