NEET Previous Year Question
Bacillus thuringiensis forms protein crystals which contain insecticidal protein. This protein
Topic: NEET PYQ
Answer: A. Full step-by-step solution below.
- ABinds with epithelial cells of midgut of the insect pest ultimately killing it.
- BIs coded by several genes including the gene cry.
- CIs activated by acid pH of the foregut of the insect pest.
- DDoes not kill the carrier bacterium which is itself resistant to this toxin.
Correct answer: A
Solution
(a) The activated Bt toxin binds to the epithelial cells of the insect midgut, creates pores in the cell membrane, causing cell lysis and death of the insect.More Biotechnology & its Applications PYQs
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