Name the enzyme which a sperm releases to penetrate the layer of corona radiata of an ovum.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Context**: The question asks for the name of the enzyme released by a sperm to penetrate the corona radiata of an ovum. The corona radiata is a layer of cells surrounding the ovum, derived from the follicular or granulosa cells.

2. **Identifying the Structure of the Sperm**: The sperm has a specialized structure called the acrosome, which is located at its head. This acrosome contains enzymes that are crucial for fertilization.

3. **Acrosomal Reaction**: When sperm come in contact with the ovum, they undergo a process known as the acrosomal reaction. During this reaction, the acrosome releases several enzymes that help the sperm penetrate the layers surrounding the ovum.

...