Which of the following is part of bioprocess engineering ?

Options

A. Techniques for formation of hybrid DNA in genetic engineering process
B. Techniques for alteration of sequence of genetic material
C. Maintenance of sterile ambiance in chemical engineering process to produce large quantities of biotechnological products
D. Methods of isolation of only desirable genes from host cell required for recombinant DNA technology

Answer

To determine which of the options is part of bioprocess engineering, we first need to understand what bioprocess engineering is. It is a field that combines principles of chemical engineering with biological sciences to develop processes for the production of biotechnological products.

### Step-by-Step Solution:

1. **Understanding Bioprocess Engineering**:
- Bioprocess engineering involves the design and development of equipment and processes for the manufacturing of products such as pharmaceuticals, biofuels, and other biotechnological products. It integrates biological and chemical engineering principles.

2. **Evaluating the Options**:
- **Option 1**: Techniques for formation of hybrid DNA in genetic engineering.
- This is primarily a biotechnology process and does not fall under bioprocess engineering.

- **Option 2**: Techniques for alteration of sequence of genetic material.
- Similar to option 1, this is also a biotechnology process and not specifically related to bioprocess engineering.

- **Option 3**: Maintenance of sterile ambience in chemical engineering process to produce large quantity of biotechnological products.
- This option is relevant as it involves maintaining sterile conditions, which is crucial in bioprocess engineering to ensure the successful production of biotechnological products.

- **Option 4**: A method of isolation of desirable gene from host cell required for recombinant DNA technology.
- This is again related to biotechnology and does not pertain to bioprocess engineering.

3. **Conclusion**:
- The only option that is part of bioprocess engineering is **Option 3**: Maintenance of sterile ambience in chemical engineering process to produce large quantity of biotechnological products.

### Final Answer:
**Option 3** is the correct answer as it is part of bioprocess engineering.

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