What was the transforming principle identified by Avery,MacLeod,and McCarty in Pneumococcus?

Which of the following was used by Hershey and Chase to prove that $DNA$ is the chemical basis of heredity?

What is the correct sequence of steps performed in the Hershey and Chase experiment?

In which medium were the viruses grown so that the infected bacteria became radioactive?

Recall the experiments done by Frederick Griffith,Avery,MacLeod,and McCarty,where $DNA$ was speculated to be the genetic material. If $RNA$,instead of $DNA$,was the genetic material,would the heat-killed strain of $Pneumococcus$ have transformed the $R$-strain into a virulent strain? Explain.

The Hershey and Chase experiment is given below. What are the processes $P, Q,$ and $R$?
$\quad\quad \quad P \quad\quad\quad Q \quad \quad\quad R$