Sulphur dioxide pollution affects

Options

A. membrane system
B. cell wall
C. nucleus
D. cytoplasm

Answer

### Step-by-Step Solution:

1. **Understanding Sulphur Dioxide**: Sulphur dioxide (SO₂) is a common air pollutant that can have various effects on living organisms and the environment.

2. **Effects on Metabolic Activities**: One of the primary effects of sulphur dioxide is its impact on the metabolic activities of cells. It can disrupt normal cellular functions.

3. **Oxidizing Agent**: Sulphur dioxide acts as an oxidizing agent. This means it can cause oxidative stress within cells, leading to potential damage to cellular components.

4. **Impact on Membrane Transport Systems**: The presence of sulphur dioxide can disrupt the transport systems associated with cellular membranes, affecting how substances move in and out of cells.

5. **Inflammation of Mucous Membranes**: In animals, exposure to sulphur dioxide can lead to inflammation of the mucous membranes, which are critical for protecting internal organs and facilitating various bodily functions.

6. **Conclusion on Affected Structures**: Based on the effects discussed, sulphur dioxide pollution primarily affects the membrane systems of cells rather than the cell wall, nucleus, or cytoplasm directly.

7. **Correct Answer**: Therefore, the correct answer to the question regarding the effects of sulphur dioxide pollution is that it affects the membrane systems associated with cells.