Bt Toxin
Trending Questions
Q. The prefix “Bt” in Bt cotton means
- “Barium treated” cotton seeds
- “Bigger thread” variety of cotton with better tensile strength
- Carrying an endotoxin gene from Bacillus thuringiensis
- Produced by “biotechnology” using restriction enzymes and ligases
Q. Cry I Ab and cry II Ab produce toxins that control
- Cotton bollworms and corn borer respectively
- Tobacco budworms and nematodes respectively
- Nematodes and tobacco budworms respectively
- Corn borer and tobacco budworms respectively
Q. What is true about Bt toxin?
- The concerned Bacillus has antitoxins
- The inactive protoxin gets converted into active form in the insect gut
- Bt protein exists as active toxin in the bacillus
- The activated toxin enters the ovaries of the pest to sterilise it and thus prevent its multiplication
Q. The Cry protein targets which part of the insect?
- Digestive system
- Nervous system
- Circulatory system
- Reproductive system
Q. What triggers activation of protoxin to the active toxin of Bacillus thuringiensis in bollworm?
- Acidic pH of stomach
- Body temperature
- Moist surface of midgut
- Alkaline pH of gut