Hyaluronic acid which binds corona radiata cells is a :-

Options

A. Homopolysaccharide
B. Amino acid
C. Mucopolysaccharide
D. Glycoprotein

Answer

### Step-by-Step Solution:

1. **Understanding the Context**: The question asks about hyaluronic acid and its role in binding corona radiata cells. The corona radiata is a layer of cells surrounding an ovulated egg.

2. **Identifying the Structure**: The corona radiata is part of the cumulus oophorus, which is composed of granulosa cells. These cells are embedded in a jelly-like matrix.

3. **Recognizing the Components**: The matrix surrounding the granulosa cells contains various substances, including mucopolysaccharides. Hyaluronic acid is specifically mentioned as a component that cements these cells together.

4. **Classifying Hyaluronic Acid**:
- **Homopolysaccharide**: This is a polysaccharide made up of one type of monosaccharide. Hyaluronic acid does not fit this definition as it is made of different monomer units.
- **Amino Acid**: This is a building block of proteins, which does not apply to hyaluronic acid.
- **Mucopolysaccharide**: This term refers to a type of polysaccharide that contains amino sugars and is involved in the formation of connective tissues. Hyaluronic acid is classified as a mucopolysaccharide.
- **Glycoprotein**: This is a molecule that consists of a protein and a carbohydrate. Hyaluronic acid does not fit this definition.

5. **Conclusion**: Given the classifications and the role of hyaluronic acid in binding the corona radiata cells, the correct answer is that hyaluronic acid is a **mucopolysaccharide**.

### Final Answer:
Hyaluronic acid which binds corona radiata cells is a **mucopolysaccharide**.

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