What is a Cistron.?

Explanation

### Step-by-Step Solution:

1. **Definition of Cistron**: A cistron is defined as a specific segment of a gene that is responsible for coding a particular polypeptide or protein.

2. **Function of a Cistron**: The primary function of a cistron is to provide the necessary information for the synthesis of proteins, which are essential for various cellular functions.

3. **Types of Cistrons**:
- **Monocistronic**: This refers to a stretch of DNA that contains a single cistron or gene. In this case, one gene codes for one protein.
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