Transformation & Genetic Material Discovery — NEET Biology
📚 Practice ConceptMoreover, he recovered living S bacteria from the dead mice.
Arrange the following experimental observations of Frederick Griffith’s Transforming Principle in the correct chronological sequence: 1. Mice injected with R strain → mice survived. 2. Mice injected with heat-killed S strain → mice survived. 3. Mice injected with S strain → mice died of pneumonia. 4. Mice injected with heat-killed S strain + live R strain → mice died, and living S strain was recovered
View solution & NCERT explanation
Correct answer: C — 3 → 1 → 2 → 4
Griffith first showed that S strain killed mice (virulent). Next, R strain was harmless → mice survived. Then, heat-killed S strain failed to kill mice. Finally, the mixture of heat-killed S + live R killed mice, and live S bacteria were recovered → proof of transforming principle.
What does NCERT say about Moreover he recovered living?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.
176/180MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.