Home › UPSC CSE › Science › Science & Technology › The Bt toxin stays inactive as a protoxin until …
The Bt toxin stays inactive as a protoxin until it meets the insect gut's:
AWatery saliva
BAlkaline pH
CAcidic juices
DLow temperature
Answer & Solution
Correct answer: B. Alkaline pH
1. The crystals dissolve only in the insect gut.
2. That gut is alkaline.
3. The alkaline pH activates the toxin.
_Source: NCERT Class 12 Biology, Chapter 12, Biotechnology and its Applications._
Related questions
The second basic principle of preventing infectious disease, keeping the immune system worThe basic key to prevention of infectious diseases is:The recruitment of immune cells to infected tissue, causing swelling, pain and fever, is:The virus causing Japanese encephalitis, entering through a mosquito bite, infects the:Typhoid-causing bacteria entering through the mouth stay in the:Female mosquitoes bite because they need blood to:Animals like mosquitoes that carry infecting agents from a sick person to another host areAntibiotics do not work against viral infections because viruses: