In which of the following genetically modified organism polygalacturonase gene is silenced ?

Options

A. Golden rice
B. Bt-cotton
C. Flavr-savr tomato
D. Bt-corn

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which genetically modified organism (GMO) has the polygalacturonase gene silenced. Polygalacturonase is an enzyme that plays a role in the ripening and softening of fruits.

2. **Analyze the Options**: The options provided are:
- Golden Rice
- Bt Cotton
- Flavor Saver Tomato
- Bt Corn

3. **Evaluate Each Option**:
- **Golden Rice**: This is a biofortified rice variety that has been genetically modified to produce beta-carotene, which is a precursor to vitamin A. It does not involve silencing the polygalacturonase gene. **(Incorrect)**
- **Bt Cotton**: This cotton variety has been genetically modified to express genes from Bacillus thuringiensis (Bt) for pest resistance. It does not involve silencing the polygalacturonase gene. **(Incorrect)**
- **Flavor Saver Tomato**: This tomato variety has been genetically modified to silence the polygalacturonase gene. By doing this, the ripening process is delayed, which helps to increase the shelf life of the tomatoes. **(Correct)**
- **Bt Corn**: Similar to Bt Cotton, this corn variety is modified for insect resistance using Bt genes. It does not involve silencing the polygalacturonase gene. **(Incorrect)**

4. **Conclusion**: The genetically modified organism in which the polygalacturonase gene is silenced is the **Flavor Saver Tomato**.

**Final Answer**: Flavor Saver Tomato

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