Antibodies are:

Options

A. Carbohydrates
B. Proteins
C. Lipids
D. Enzymes

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.

2. **Identifying the Options**: The options provided are carbohydrates, proteins, lipids, and enzymes.

3. **Analyzing Each Option**:
- **Carbohydrates**: These are organic compounds that serve primarily as energy sources. They include sugars and starches but do not play a role in the immune response.
- **Proteins**: These are large, complex molecules made up of amino acids. They perform a variety of functions in the body, including serving as antibodies.
- **Lipids**: These are fats and oils that are primarily used for energy storage and do not function as antibodies.
- **Enzymes**: These are also proteins that act as catalysts to speed up biochemical reactions but are not specifically involved in the immune response like antibodies.

4. **Conclusion**: Since antibodies are specialized proteins that play a crucial role in the immune system, the correct answer is that antibodies are proteins.

5. **Final Answer**: Antibodies are proteins (Option B).

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