Write the different components of a lac - operon in E . Coli Explain its expression while in an 'open' state.

Explanation

### Step-by-Step Solution

**Step 1: Identify the Components of the Lac Operon**
The lac operon in E. coli consists of the following components:
1. **Regulatory Gene (lacI)**: This gene codes for the repressor protein that inhibits the operon.
2. **Promoter (P)**: The site where RNA polymerase binds to initiate transcription.
3. **Operator (O)**: The segment where the repressor binds to block transcription.
4. **Structural Genes (lacZ, lacY, lacA)**: These genes code for proteins involved in lactose metabolism:
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