Which of these peope would NOT ue yeast in the given scenarios?

Options

A. A man who makes beer
B. A man who makes wine
C. A man who runs a bakery
D. A man who runs a biogas plant

Answer

**Step-by-Step Solution:**

1. **Understanding Yeast**: Yeast is a unicellular fungus that can perform fermentation, which is a process of anaerobic respiration. It is commonly used in various industries for its ability to convert sugars into alcohol and carbon dioxide.

2. **Analyzing the Scenarios**:
- **A man who makes beer**: Yeast is essential in beer production as it ferments barley in anaerobic conditions to produce alcohol.
- **A man who makes wine**: Similar to beer, yeast is used to ferment fruit juices (like grapes) in the production of wine, also in anaerobic conditions.
- **A man who runs a bakery**: In baking, yeast is used to make bread rise by producing carbon dioxide through aerobic respiration, which makes the dough fluffy.
- **A man who runs a biogas plant**: Biogas is produced through the action of methanogenic bacteria, not yeast. Yeast does not play a role in the production of biogas.

3. **Identifying the Correct Answer**: Since yeast is not used in the biogas plant scenario, the answer to the question is the man who runs a biogas plant.

4. **Conclusion**: The person who would NOT use yeast in the given scenarios is the man who runs a biogas plant.

**Final Answer**: D. A man who runs a biogas plant.

---