Transforming principle in bacteria is $DNA$. This was first proved through experiments performed by . . . . . . .

$DNA$,present in the nucleus,was named as 'Nuclein' by

Analyze the following experimental steps performed by Frederick Griffith:
$I - R$ strain $\rightarrow$ injected into mice
$II - S$ strain $\rightarrow$ injected into mice
$III - S$ strain (heat-killed) $\rightarrow$ injected into mice
$IV - S$ strain (heat-killed) $+ R$ strain (live) $\rightarrow$ injected into mice
In which of the above stages will the mice remain alive?

The term 'Nuclein' for the genetic material was used by:

Which of the following molecules was the subject of debate regarding the genetic material?

Define transformation in Griffith's experiment. Discuss how it helps in the identification of $DNA$ as the genetic material.