Antibodies in our body are complex

Options

A. Liporoteins
B. Steroids
C. Prostaglandins
D. Glycoproteins

Answer

**Step-by-Step Solution:**

1. **Understanding Antibodies**: Antibodies are specialized proteins produced by the immune system to identify and neutralize foreign objects like bacteria and viruses. They play a crucial role in the immune response.

2. **Composition of Antibodies**: Antibodies are complex molecules that consist of both protein and carbohydrate components. This combination is essential for their function in the immune system.

3. **Evaluating the Options**:
- **Lipoproteins**: These are complexes of lipids and proteins, primarily involved in transporting fats in the body. They are not antibodies.
- **Steroids**: These are a class of lipids characterized by a carbon skeleton with four fused rings. They do not have the structure of antibodies.
- **Prostaglandins**: These are lipid compounds that have hormone-like effects and are derived from fatty acids. They are not antibodies.
- **Glycoproteins**: These are molecules that consist of protein and carbohydrate chains. This matches the composition of antibodies.

4. **Conclusion**: Since antibodies are indeed glycoproteins (composed of protein and carbohydrate), the correct answer to the question is **option D: glycoproteins**.