CUET · BIOLOGY · PYQ PAPER 2023
Which one of the followings is not a feature of insecticidal protein crystals formed by Bacillus thuringiensis:
- A When formed they exist as inactive protoxin.
- B They are converted into an active form of toxin in the alkaline pH of the gut, which solubilize the crystals.
- C They are effective against certain insects such as lepidopterans, coleopterans and dipterans.
- D The activated toxin does not bind the surface of midgut epithelial cells which leads to pore formation, cell swelling and lysis.
Answer & Solution
Correct Answer
(D) The activated toxin does not bind the surface of midgut epithelial cells which leads to pore formation, cell swelling and lysis.
Step-by-step Solution
Detailed explanation
The activated toxin does not bind the surface of midgut epithelial cells which leads to pore formation, cell swelling and lysis.
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