Which element is component of middle lamella of cell wall?

Options

A. `Mn^(2+)`
B. `Fe^(3+)`
C. `Ca^(2+)`
D. `K^(+)`

Answer

### Step-by-Step Solution:

1. **Understanding the Middle Lamella**: The middle lamella is a layer that exists between the cell walls of adjacent plant cells. It plays a crucial role in holding the cells together and providing structural integrity.

2. **Function of the Middle Lamella**: The primary function of the middle lamella is to provide tensile strength to the cell wall. This strength is essential for protecting the cell wall and maintaining the overall structure of the plant tissue.

3. **Composition of the Middle Lamella**: The middle lamella is primarily composed of pectin, which is a polysaccharide. Pectin is important for the stability and rigidity of the cell wall.

4. **Elements in Pectin**: Pectin itself is made up of various components, including calcium and magnesium. These elements form calcium pectate and magnesium pectate, which are crucial for the formation and stability of the pectin structure in the middle lamella.

5. **Identifying the Key Element**: Among the elements mentioned, calcium is a significant component of the middle lamella as it forms calcium pectate, which is essential for the structural integrity of the middle lamella.

6. **Conclusion**: Therefore, the correct answer to the question regarding which element is a component of the middle lamella of the cell wall is **calcium**.