NEETBiologyBiotechnology and Its ApplicationsMCQ+4 / −1
What is true about Bt toxin ?
- AThe activated toxin enters the ovaries of the pest to sterillise it and thus prevent its multiplication.
- BBt protein exists as active toxin in the Bacillus
- CThe concerned Bacillus has antitoxins
- DThe inactive protoxin gets converted into active form in the insect gut
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Correct answer: D
About Bt toxin, it is true, that the inactive
protoxin gets converted into active form in
the insect gut. There are several advantages
in expressing Bt toxins in transgenic Bt crops.
The level of toxin expression can be very
high, thus delivering sufficient dosage to the
pest.
The toxin expression is contained within the
plant system and hence only those insects that
feed on the crop perish. The toxin expression
can be modulated by using tissue-specific
promoters and replaces the use of synthetic
pesticides in the environment.
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