Assertion: The activated toxin binds to the surfacce of midgut epithelial cells & create pores that cause cell swelling & lysis & finally death of insect
Reason :Most of Bt toxins are insect group specific

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion
B. It both Assertion & Reason are True but Reason is not a correct explanation of the Assetion
C. If Assertion is True but the Reason is False
D. If both Assertion & Reason are false

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that the activated toxin binds to the surface of midgut epithelial cells, creates pores, causes cell swelling and lysis, and ultimately leads to the death of the insect. This describes the mechanism of action of Bt (Bacillus thuringiensis) toxins.

2. **Understanding the Reason**: The reason provided is that most Bt toxins are insect group-specific. This means that different types of Bt toxins affect specific groups of insects rather than all insects.

3. **Analyzing the Mechanism**: The activated Bt toxin, which is derived from the cry gene present in Bacillus thuringiensis, is ingested by insects. In the alkaline environment of the insect's midgut, the protoxin is activated into its active form. This active toxin binds to the midgut epithelial cells, creating pores that lead to cell swelling and lysis, ultimately causing the insect's death.

4. **Evaluating the Truth of the Statements**:
- The assertion is true because it accurately describes the process by which Bt toxins kill insects.
- The reason is also true because it correctly states that different Bt toxins target specific insect groups.

5. **Determining the Relationship**: While both statements are true, the reason does not explain the assertion. The assertion focuses on the mechanism of action of the toxin, while the reason discusses the specificity of the toxins without explaining how that relates to the mechanism of action.

6. **Conclusion**: Both the assertion and reason are true, but the reason does not serve as a correct explanation for the assertion. Therefore, the correct answer is that both statements are true, but the reason is not a correct explanation of the assertion.

### Final Answer:
Both the assertion and reason are true, but the reason is not a correct explanation of the assertion.

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