NEET 2026 (Phase 1) · BiologyPrevious Year Question
The toxin proteins isolated from Bacillus thuringiensis, coded by which of the following genes would control cotton bollworms and corn borer, respectively? (NEET 2026)
Answer: (A) cryIAc and cryIAb. Answer: (a) cryIAc and cryIAb Solution: The proteins encoded by the genes cryIAc (and cryIIAb) control the cotton bollworms, while the protein of cryIAb controls corn borer.
- A.cryIAc and cryIAb✓
- B.cryIAc and cryIIAb
- C.cryIIAb and cryIAc
- D.cryIAc and cryIIIAb
Correct Answer
(A) cryIAc and cryIAb
Solution & Explanation
Answer: (a) cryIAc and cryIAb Solution: The proteins encoded by the genes cryIAc (and cryIIAb) control the cotton bollworms, while the protein of cryIAb controls corn borer. For cotton bollworm and corn borer respectively, the matching pair is cryIAc and cryIAb = option (a). NCERT Reference: Ch 10, p.180, line 6 — "encoded by the genes cryIAc and cryIIAb control the cotton bollworms,"; p.180, line 8 — "that of cryIAb controls corn borer."
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