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

1. Escherichia and Agrobacterium
2. Nitrobacter and Azotobacter
3. Rhizobium and Diplococcus
4. Nitrosomonas and Klebsiella

Correct answer: Escherichia and Agrobacterium

Solution

Escherichia coli is widely used in genetic engineering because it grows quickly and carries plasmids that are easy to manipulate. Agrobacterium tumefaciens is valuable because it naturally transfers DNA into plant cells, making it a key tool for plant genetic modification.

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