Question
The B t toxin in genetically engineered B t cotton kills the pest by:
NEET
Zoology
Biotechnology and Its Applications
2024
NEET 2024 (Re-NEET)
NEET Zoology Question (2024) — Solution
Options
- A. Creating pores in the midgut
- B. Damaging the respiratory system
- C. Degenerating the nervous system
- D. Altering the pH of body fluids
Answer
A. Creating pores in the midgut
Step-by-step solution
Option (1) is the correct answer because the activated toxin binds to the surface of midgut epithelial cells and creates pore that cause cell swelling and lysis and eventually cause death of the insect. B t toxin doesn't kill pest by affecting their respiratory system, nervous system and it doesn't alter the pH of body fluids. So, options (2), (3) and (4) are not the answer.
Related: Zoology — Biotechnology and Its Applications · All PYQ Banks