Fertilizin is

Options

A. Phospholipid
B. Steroid
C. Carbohydrate
D. Glycoprotein.

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Fertilizin":**
- Fertilizin is a substance involved in the fertilization process. It plays a crucial role in the interaction between sperm and egg.

2. **Identifying the Nature of Fertilizin:**
- Fertilizin is known to be a component found on the surface of the ovum (egg). It is essential for the recognition and binding of sperm.

3. **Analyzing the Options:**
- The options provided are:
- A) Phospholipid
- B) Steroid
- C) Carbohydrate
- D) Glycoprotein

4. **Determining the Correct Answer:**
- Among the options, glycoprotein is the correct classification for fertilizin. Glycoproteins are molecules that consist of a protein and a carbohydrate component, and they are often involved in cell recognition and signaling.

5. **Conclusion:**
- Therefore, the correct answer to the question "Fertilizin is" is **D) Glycoprotein**.

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