Which of the following is not a function of bile juice?

Options

A. It neutralises gastric acid
B. It emulsifies fats
C. It helps in digestion of protein
D. It removes several waste products

Answer

**Step-by-Step Solution:**

1. **Understanding Bile Juice**: Bile juice is a digestive fluid produced by the liver and stored in the gallbladder. It plays a crucial role in digestion, particularly in the emulsification of fats.

2. **Functions of Bile Juice**:
- **Neutralizing Gastric Acid**: Bile juice helps to neutralize the acidity of gastric juice when it enters the small intestine, creating an optimal pH for digestive enzymes to function.
- **Emulsifying Fats**: One of the primary functions of bile juice is to emulsify fats, breaking them down into smaller droplets, which increases the surface area for enzymes to act upon.
- **Removing Waste Products**: Bile juice also aids in the excretion of waste products, such as bilirubin and cholesterol, from the body.

3. **Analyzing the Options**:
- **Option 1: Neutralize gastric acid** - This is a function of bile juice.
- **Option 2: Emulsify fats** - This is a function of bile juice.
- **Option 3: Help in protein digestion** - This is NOT a function of bile juice. Protein digestion primarily occurs in the stomach and small intestine through the action of enzymes like pepsin and trypsin.
- **Option 4: Remove several waste products** - This is a function of bile juice.

4. **Conclusion**: Based on the analysis, the option that is NOT a function of bile juice is **helping in protein digestion**.

**Final Answer**: The correct answer is **help in protein digestion**.

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