Zinder and Lederberg demonstrated the process of transduction in which of the following bacteria?

Explain the role of the following scientists in the discovery of $DNA$:
$1.$ Friedrich Miescher $(1869)$
$2.$ Maurice Wilkins and Rosalind Franklin

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

Which of the following is incorrect for the Hershey-Chase experiment?

Explain the biochemical characterization of the transforming principle.

The unequivocal proof that $DNA$ is the genetic material came from the experiments of Hershey and Chase. They worked on which of the following?