What does 'Bt' in Bt toxin represent?

Options

A. Bioterrorism
B. Bleeding ·toxin
C. Bacillus thuringiensis
D. Blue tooth toxin

Answer

**Step-by-Step Solution:**

1. **Identify the abbreviation 'Bt':** The question asks what 'Bt' in Bt toxin stands for.

2. **Recognize the source of Bt toxin:** Bt toxin is derived from a specific bacterium known as Bacillus thuringiensis.

3. **Understand the role of Bacillus thuringiensis:** This bacterium produces proteins that are toxic to certain insects, making it useful in agriculture for pest control.

4. **Explain the mechanism of action:** The Bt toxin is initially produced as an inactive form called protoxin. When ingested by insects, it becomes active in their alkaline gut, leading to the destruction of their midgut epithelial cells, which ultimately kills the insect.

5. **Clarify the terminology:** The Bt toxin is also referred to as cryoproteins, which are produced by the Bt genes within the bacterium.

6. **Conclude with the correct answer:** Therefore, 'Bt' in Bt toxin stands for Bacillus thuringiensis.

**Final Answer:** 'Bt' in Bt toxin represents Bacillus thuringiensis.

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