Question
Download Solution PDFAny gene artificially transferred into an organism is usually referred to as a transgene. Bt toxin from Bucillus thuringiensis
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is interferes with a receptor found in the larval gut of certain insects
Concept:
- A transgene is any gene that is artificially transferred from one organism to another. This process is a fundamental aspect of genetic engineering and biotechnology.
- Bacillus thuringiensis (Bt) is a bacterium that produces a toxin (Bt toxin) harmful to certain insects. This toxin has been used in genetically modified crops to provide resistance to insect pests.
- The Bt toxin operates by interfering with specific receptors in the gut of insect larvae, leading to their death. This specificity makes it a valuable tool in pest management.
Explanation:
- Option 1: interferes with a receptor found in the larval gut of certain insects: This is the correct answer. Bt toxin works by binding to receptors in the gut cells of susceptible insect larvae, causing cell lysis and eventually killing the insect. This mechanism is highly specific to certain insect pests, making Bt crops an effective pest control strategy.
- Option 2: non-toxic to susceptible insects: This is incorrect. Bt toxin is specifically toxic to susceptible insects, which is why it is used as a biological pesticide.
- Option 3: harmful to most other organisms: This is incorrect. Bt toxin is generally considered safe for humans, animals, and most non-target organisms because the receptors it binds to are specific to certain insect pests.
- Option 4: can kill weeds but does not harm resistant crop plants: This is incorrect. Bt toxin is not used for weed control; it is used for controlling insect pests. Herbicide-resistant crops and Bt crops are different types of genetically modified organisms (GMOs).
Last updated on Jun 18, 2025
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