Which enzyme converts milk into curd?

Answer

To solve the question "Which enzyme converts milk into curd?", we can follow these steps:

### Step 1: Identify the Process
The process of converting milk into curd involves fermentation. This is a biological process where microorganisms convert sugars into acids, gases, or alcohol.

**Hint:** Think about the role of microorganisms in food processing.

### Step 2: Recognize the Microorganism
The primary microorganism responsible for this fermentation is a type of bacteria. Specifically, we are looking for the bacteria that is commonly used in the dairy industry to make curd.

**Hint:** Recall common bacteria used in yogurt and curd production.

### Step 3: Name the Enzyme
The bacteria that converts milk into curd is called *Lactobacillus*. This bacterium produces an enzyme that helps in the fermentation process.

**Hint:** Remember that the name of the bacterium is often associated with lactose, the sugar found in milk.

### Step 4: Understand the Reaction
The *Lactobacillus* bacteria convert lactose (the sugar in milk) into lactic acid. This lactic acid is what causes the milk to sour and thicken, resulting in curd.

**Hint:** Think about the chemical changes that occur during the fermentation of milk.

### Step 5: Conclusion
The answer to the question is that the enzyme produced by *Lactobacillus* is responsible for converting milk into curd.

**Final Answer:** The enzyme that converts milk into curd is produced by *Lactobacillus*.

### Summary of Steps:
1. Identify the fermentation process.
2. Recognize *Lactobacillus* as the key microorganism.
3. Name the enzyme associated with this process.
4. Understand the conversion of lactose to lactic acid.
5. Conclude with the answer.