Isolation of Bt gene from bacterium Bacillus thuringiensis was undertaken in year

Options

A. 1977
B. 1980
C. 1997
D. 1990

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the year when the Bt gene was isolated from the bacterium Bacillus thuringiensis.

2. **Identifying the Options**: The options provided are 1977, 1980, 1990, and 1997.

3. **Researching the Isolation of Bt Gene**: The Bt gene, which produces a protein toxic to certain pests, was first isolated from Bacillus thuringiensis in the year 1980. This gene is significant in the development of genetically modified crops, particularly Bt cotton.

4. **Connecting to Genetically Modified Organisms (GMOs)**: The Bt gene was inserted into cotton plants to create Bt cotton, which is resistant to pests like the cotton bollworm. This modification allows the plant to produce its own insecticide, reducing the need for chemical insecticides.

5. **Final Answer**: Based on the information gathered, the year when the isolation of the Bt gene from Bacillus thuringiensis was undertaken is **1980**.

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