Explain the role of bacteria in the following.
Curdling of milk

Explanation

**Step-by-Step Solution:**

1. **Introduction to Bacteria in Curd Making:**
- The process of curdling milk involves specific bacteria, primarily Lactobacillus, which play a crucial role in transforming milk into curd.

2. **Presence of Lactose in Milk:**
- Milk contains a sugar called lactose. This sugar is essential for the fermentation process that leads to curd formation.

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