Which one of the following acts as cementing material

Options

A. Calcium salt
B. Pectic acid
C. Calcium pectate
D. none of these

Answer

To solve the question "Which one of the following acts as cementing material?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the material that serves as a cementing agent between cells. This is typically related to the structure of plant cells.

2. **Identify Key Terms**: The term "cementing material" refers to a substance that binds or holds cells together. In plant cells, this is often associated with the middle lamella.

3. **Recall the Function of Middle Lamella**: The middle lamella is a layer that exists between the cell walls of adjacent plant cells. It is primarily responsible for adhering cells together.

4. **Determine the Composition of Middle Lamella**: The middle lamella is mainly composed of pectin, which is a polysaccharide. It is crucial for cell adhesion and allows for cell wall expansion during growth.

5. **Evaluate the Options**:
- **Option 1: Calcium salt** - This is not specifically related to the cementing function.
- **Option 2: Pactic acid** - This is incorrect as it does not serve as a cementing material.
- **Option 3: Calcium Pectate** - This is the correct answer as it is a component of the middle lamella and acts as the cementing material between cells.
- **Option 4: Other options** - Evaluate them similarly to confirm they do not fit the criteria.

6. **Select the Correct Answer**: Based on the evaluation, the correct answer is **Calcium Pectate** (Option 3), as it is the cementing material that binds adjacent cells together.

### Final Answer:
The correct answer is **Calcium Pectate** (Option 3).

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