Two bacteria found to be very useful in genetic engineering experiments are

Options

A. Nitrosomonas and Klebsiella
B. Nitrobacter and Azotobacter
C. Rhizobium and Diplococcus
D. Escherichia and Agrobacterium

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for two bacteria that are particularly useful in genetic engineering experiments.

2. **Identifying Relevant Bacteria**: In the context of genetic engineering, certain bacteria are known for their roles in manipulating genetic material. The most notable among these are:
- **Escherichia coli (E. coli)**: This bacterium is widely used as a model organism in molecular biology and genetic engineering due to its well-understood genetics and ability to replicate DNA quickly.
- **Agrobacterium tumefaciens**: This soil bacterium is known for its ability to transfer DNA to plant cells, making it a key player in plant genetic engineering.

3. **Evaluating the Options**: The options provided in the question include:
- Nidrosomonas and Klebsiella
- Nitrobacter and Azotobacter
- Rhizobium and Diplococcus
- Escherichia and Agrobacterium

Among these, **Escherichia (E. coli)** and **Agrobacterium tumefaciens** are the most relevant for genetic engineering.

4. **Conclusion**: Therefore, the two bacteria that are very useful in genetic engineering experiments are **Escherichia coli** and **Agrobacterium tumefaciens**.

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