In a plant cell, ____________ protects protoplasm against infections.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for a structure in a plant cell that protects the protoplasm against infections.

2. **Identifying Key Terms**: The term "protoplasm" refers to the living content of a cell, which includes the cytoplasm and the nucleus. The question specifically mentions protection against infections.

3. **Recalling Plant Cell Structures**: In plant cells, there are several structures, but the most notable one that provides protection is the cell wall.

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