Question

Following representations P, Q, and R denote few steps of Griffith Experiment. Identify the correct one(s).
P. R strain → Inject into mice → Mice die
Q. S strain (Heat killed) → Inject into mice → Mice die
R. R strain → Inject into mice → Mice live

• A. P only
• B. R only
• C. P and R
• D. Q and R

Hint:

Griffith’s experiment laid the foundation for the discovery of DNA as the genetic material.

Answer 1

The Correct Option is B

Griffith’s experiment demonstrated transformation by showing that non-virulent R strain bacteria do not kill mice unless combined with heat-killed virulent S strain bacteria.
R strain alone is harmless, as seen in step R. Steps P and Q are incorrect representations of Griffith’s findings.