Pectinase helps in the ripening of fruit because it dissolves

Options

A. Cellulose
B. Primary cell wall
C. Secondary cell wall
D. Calcium pectate

Answer

### Step-by-Step Solution:

1. **Understanding the Role of Pectinase**: Pectinase is an enzyme that plays a crucial role in the ripening of fruits. It specifically targets pectin, a polysaccharide found in the cell walls of plants.

2. **Identifying Pectin**: Pectin is a structural polysaccharide that helps to hold plant cells together. It is a major component of the middle lamella, which is the layer that cements adjacent plant cells together.

3. **Analyzing the Options**:
- **Option 1: Salulose**: This is incorrect. Salulose is a type of sugar and not directly related to the function of pectinase in fruit ripening.
- **Option 2: Primary Cell Wall**: This option is also incorrect. While the primary cell wall does play a role in plant structure, it is not specifically what pectinase dissolves.
- **Option 3: Secondary Cell Wall**: This option is incorrect as well. The secondary cell wall is not involved in the ripening process in the same way as pectin.
- **Option 4: Calcium Pectate**: This is the correct answer. Pectinase breaks down calcium pectate, which is a component of the middle lamella, facilitating the softening of fruit during ripening.

4. **Conclusion**: Therefore, pectinase helps in the ripening of fruit because it dissolves calcium pectate, which leads to the breakdown of the middle lamella and results in the softening of the fruit.

### Final Answer:
Pectinase helps in the ripening of fruit because it dissolves **calcium pectate**.

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