Mucin present in saliva is a

Options

A. Mucoprotein
B. Mucopolysaccharide
C. Deride protein
D. Samall polysachharide.

Answer

To answer the question "Mucin present in saliva is a," we will analyze the options provided and determine the correct classification of mucin.

### Step-by-Step Solution:

1. **Understanding Mucin**:
- Mucin is a component found in saliva, which is a secretion produced by salivary glands. It plays a crucial role in maintaining oral health and lubrication.

2. **Identifying the Nature of Mucin**:
- Mucin is primarily known as a glycoprotein. Glycoproteins are proteins that have carbohydrate groups attached to the polypeptide chain. Mucin specifically helps in forming mucus, which is important for lubrication and protection of epithelial surfaces.

3. **Evaluating the Options**:
- **Option 1: Mucoprotein**: This term is often used interchangeably with glycoprotein when referring to mucin. Therefore, this option is likely correct.
- **Option 2: Mucopolysaccharide**: Mucins contain carbohydrates, but they are not classified as mucopolysaccharides, which are more complex polysaccharides. This option is incorrect.
- **Option 3: Derived protein**: This term does not accurately describe mucin. Derived proteins are typically those that have been modified from their original form, which does not apply here. This option is incorrect.
- **Option 4: Small polysaccharide**: Mucin is not a small polysaccharide; it is a glycoprotein. This option is also incorrect.

4. **Conclusion**:
- Based on the definitions and evaluations of the options, the correct answer is **Option 1: Mucoprotein**.

### Final Answer:
Mucin present in saliva is a **mucoprotein**.