The portion of DNA which contains information for an entire polypeptide is called :

Options

A. Cistron
B. Muton
C. Recon
D. Operon

Answer

To answer the question, "The portion of DNA which contains information for an entire polypeptide is called:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks for the specific term used to describe a segment of DNA that encodes the information necessary to produce an entire polypeptide (protein).

2. **Identifying Key Terms**:
- The key terms in the question are "portion of DNA" and "entire polypeptide".

3. **Evaluating Possible Answers**:
- The options provided in the video transcript include:
- Muton
- Recon
- Operon
- Sistron

4. **Defining Each Term**:
- **Muton**: The smallest unit of DNA that can undergo mutation. It does not encode an entire polypeptide.
- **Recon**: A segment of DNA that is involved in recombination but does not specifically code for a polypeptide.
- **Operon**: A cluster of genes under the control of a single promoter, which regulates multiple genes but does not refer to a single polypeptide.
- **Sistron**: A segment of DNA that contains the information necessary for the synthesis of an entire polypeptide.

5. **Choosing the Correct Answer**:
- Based on the definitions, the term that specifically refers to a DNA segment encoding an entire polypeptide is **Sistron**.

### Final Answer:
The portion of DNA which contains information for an entire polypeptide is called **Sistron**.