Substrate for lipase is

Options

A. Fat
B. Protein
C. Carbohydrate
D. Nucleic acid

Answer

### Step-by-Step Solution

1. **Understanding Lipase**: Lipase is an enzyme that plays a crucial role in the digestion of fats. It is important to identify what lipase acts upon.

2. **Identifying the Substrate**: The substrate for an enzyme is the substance upon which the enzyme acts. In the case of lipase, it specifically targets fats.

3. **Function of Lipase**: Lipase catalyzes the hydrolysis of emulsified fats. This means it breaks down fats into smaller components, primarily fatty acids and glycerol.

4. **Source of Lipase**: Lipase is produced by the pancreas and secreted into the small intestine, where it performs its function of breaking down fats.

5. **Analyzing the Options**:
- **Option 1: Fat** - This is the correct substrate for lipase.
- **Option 2: Protein** - Proteins are substrates for different enzymes like pepsin and trypsin, not lipase.
- **Option 3: Carbohydrate** - Carbohydrates, such as starch, are substrates for salivary amylase, not lipase.
- **Option 4: Nucleic Acid** - Nucleic acids are substrates for nucleases, not lipase.

6. **Conclusion**: Based on the analysis, the only correct option is **fat**, which is the substrate for lipase.

### Final Answer
The substrate for lipase is **fat**.

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