A substance produced by an bacteria and inhibits the growth of other pathogenic bacteria is called:

Options

A. Antigen
B. Antibody
C. Antibiotic
D. Antimetabolite

Answer

To answer the question, "A substance produced by a bacteria and inhibits the growth of other pathogenic bacteria is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a specific term that describes a substance produced by bacteria that can inhibit the growth of other pathogenic bacteria.

2. **Identifying Key Terms**:
- **Bacteria**: Microorganisms that can produce certain substances.
- **Pathogenic Bacteria**: Bacteria that cause diseases.
- **Inhibit Growth**: To slow down or stop the growth of these pathogenic bacteria.

3. **Recognizing the Function of Certain Bacteria**: Some bacteria are known to produce chemicals that can inhibit the growth of other harmful bacteria.

4. **Defining the Term**: The term that describes a substance produced by bacteria that inhibits the growth of other pathogenic bacteria is known as an **Antibiotic**.

5. **Differentiating from Other Terms**:
- **Antigen**: A substance that induces an immune response, not related to inhibiting bacterial growth.
- **Antibody**: A protein produced in response to an antigen, also not relevant to the question.
- **Antimetabolites**: Substances that interfere with metabolic processes, not specifically related to bacteria.

6. **Conclusion**: Therefore, the correct answer to the question is **Antibiotic**.

### Final Answer:
A substance produced by bacteria that inhibits the growth of other pathogenic bacteria is called an **Antibiotic**.

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