Answer: cry genes.
- A nif genes
- B cry genes
- C lac genes
- D tox genes
Correct answer: B. cry genes
Explanation: The insecticidal crystal (Cry) proteins of B. thuringiensis are encoded by genes called cry genes, such as cryIAc and cryIIAb.
Concept context
GM crops, transgenic animals, gene therapy, molecular diagnostics, and bioethics. Frequent 2–3 mark questions in NEET.