Curdling of milk in small intestine would occur with the help of

Options

A. rennin
B. erypsine
C. trypsine
D. chymotrypsin .

Explanation

To solve the question regarding the curdling of milk in the small intestine, we need to identify the enzyme responsible for this process. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand the Process of Milk Digestion
- Milk contains proteins, primarily casein, which need to be digested. In infants, the digestion of milk proteins occurs primarily in the stomach and small intestine.

### Step 2: Identify the Enzyme Responsible for Curdling
- The enzyme responsible for curdling milk proteins is called **renin** (also known as rennin). This enzyme is particularly important in infants as it helps to coagulate milk proteins, forming curds.

### Step 3: Mechanism of Action
- Renin acts on casein in the milk, converting it into a substance called calcium paracaseinate, which is the curdled form of milk. This process is essential for proper digestion and absorption of milk in infants.

### Step 4: Distinguish Other Enzymes
- Other enzymes mentioned, such as trypsin (also known as erepsin) and chymotrypsin, are involved in protein digestion but do not specifically curdle milk. They are activated in the small intestine but are not responsible for the initial curdling of milk.

### Step 5: Conclusion
- Based on the understanding of milk digestion and the role of renin, we can conclude that the correct answer to the question is **renin**.

### Final Answer
The curdling of milk in the small intestine occurs with the help of **renin**.

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