MCQ
Which of the following statements are correct for Griffith experiments ?
(i) Frederick Griffith did experiments with Streptococcus pneumoniae.
(ii) Mice infected with the S strain die from pneumonia infection but mice infected with the R strain do not develop pneumonia.
(iii) Heat-killed S strain bacteria injected into mice did not kill them.
(iv) Mixture of heat-killed S and live R bacteria injected into mice then the mice died, and living S bacteria recovered from the dead mice.
(v) Some transforming principle' called genetic material transferred from the heat-killed S strain to R strain bacteria and enabled the R strain to become virulent.
(vi) The biochemical nature of genetic material was not defined from this experiments.
(i) Frederick Griffith did experiments with Streptococcus pneumoniae.
(ii) Mice infected with the S strain die from pneumonia infection but mice infected with the R strain do not develop pneumonia.
(iii) Heat-killed S strain bacteria injected into mice did not kill them.
(iv) Mixture of heat-killed S and live R bacteria injected into mice then the mice died, and living S bacteria recovered from the dead mice.
(v) Some transforming principle' called genetic material transferred from the heat-killed S strain to R strain bacteria and enabled the R strain to become virulent.
(vi) The biochemical nature of genetic material was not defined from this experiments.
- A(i), (ii) and (vi)
- B(iv) and (v)
- C(iii) and (v)
- ✓All of the above