Question

In Griffith's transforming principle, if heat-killed S - strain is injected into mice, then:

• A. Transformation of S - strain into R - strain will occur.
• B. Transformation of R - strain into S - strain will occur.
• C. Mice will die.
• D. Mice will live.

Answer 1

Answer: (D)

Frederick Griffith has done experiments on bacteria Streptococcus pneumonia. This bacteria causes pneumonia.

Step 1	S -strain injected into the mice	Mice die
Step 2	R -strain injected into the mice	Mice live
Step 3	Heat killed S -strain injected into the mice	Mice live
Step 4	Heat killed S -strain + R -strain injected into the mice	Mice die