Answer: It exists as an inactive protoxin until activated in the insect gut.
- A The plant rapidly destroys the Cry protein before it can act
- B It is stored only in the seeds
- C The plant lacks ribosomes to make it
- D It exists as an inactive protoxin until activated in the insect gut
Correct answer: D. It exists as an inactive protoxin until activated in the insect gut
Explanation: The Cry protein is produced as an inactive protoxin; it is converted to the active toxin only in the alkaline pH of the insect gut, so it does not harm the plant.
Concept context
GM crops, transgenic animals, gene therapy, molecular diagnostics, and bioethics. Frequent 2–3 mark questions in NEET.