Streptococcus is used in preparation of

Options

A. Wine
B. Idli
C. Cheese
D. Bread.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the specific use of the bacterium Streptococcus in food preparation.

2. **Identifying the Relevant Bacterium**: Streptococcus thermophilus is a type of bacteria that is relevant to food production. It is a probiotic bacterium known for its beneficial effects on health.

3. **Exploring Food Products**:
- **Idli**: The preparation of idli primarily involves the fermentation of rice and lentil batter using Lactobacillus bacteria, not Streptococcus.
- **Bread**: Bread is typically made using baker's yeast (Saccharomyces cerevisiae), not Streptococcus.
- **Wine**: Wine production involves yeast and lactic acid bacteria, but not specifically Streptococcus.
- **Cheese**: Streptococcus thermophilus is commonly used in the dairy industry for the production of cheese and yogurt. It helps in the fermentation process, contributing to the texture and flavor of the cheese.

4. **Conclusion**: Based on the information gathered, the correct answer to the question is that Streptococcus is used in the preparation of cheese.

**Final Answer**: Streptococcus is used in the preparation of cheese.

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