What is an antibiotic? Describe the mechanism of action of antibiotics with the help of an example.

Explanation

### Step-by-Step Solution:

1. **Definition of Antibiotics**:
- Antibiotics are chemical substances that are produced by microorganisms, such as fungi and bacteria. They are designed to kill or inhibit the growth of other microorganisms, particularly pathogens that cause diseases.

2. **Function of Antibiotics**:
- The primary function of antibiotics is to combat infections by targeting harmful bacteria. They work specifically against pathogens, which are the organisms responsible for causing diseases.

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