Select the incorrect statement/s regarding downstream processing from the one given below.
I. The process occurs during the biosynthetic stage.
II. It is there to facilitate increased production of desired product .
III. It helps to ensure sterile conditions during the manufacturing of the desired product.
IV. Collection of processes to ensure the desired product is ready for marketing.

Options

A. I, II and III only
B. I, II and III IV
C. II and III only
D. I and IV only

Answer

To solve the question regarding downstream processing, we need to analyze each statement provided and determine which one is incorrect.

### Step-by-Step Solution:

1. **Understanding Downstream Processing**:
- Downstream processing refers to the recovery and purification of biosynthetic products after they have been produced. This is a crucial part of bioprocessing in biotechnology.

2. **Analyzing Statement I**:
- **Statement I**: "The process occurs during the biosynthetic stage."
- This statement is **incorrect**. Downstream processing occurs after the biosynthetic stage, not during it. The biosynthetic stage is when the product is being produced, while downstream processing involves recovery and purification after production.

3. **Analyzing Statement II**:
- **Statement II**: "It is there to facilitate increased production of the desired product."
- This statement is **correct**. Downstream processing is designed to maximize the yield of the desired product by efficiently recovering and purifying it.

4. **Analyzing Statement III**:
- **Statement III**: "It helps to ensure sterile conditions during the manufacturing of the desired product."
- This statement is **correct**. Downstream processing includes steps that ensure the product is free from contaminants, thus maintaining sterility.

5. **Analyzing Statement IV**:
- **Statement IV**: "Collection of processes to ensure the desired product is ready for marketing."
- This statement is **correct**. Downstream processing indeed consists of various processes to prepare the product for market readiness, including purification and formulation.

### Conclusion:
From the analysis, the incorrect statement regarding downstream processing is **Statement I**.

### Final Answer:
**The incorrect statement is: I. The process occurs during the biosynthetic stage.**

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