$DNA$ is considered the genetic material because:

In $1920$,nucleic acid was identified as a major component of which of the following?

The scientists involved in the discovery of $DNA$ as the chemical basis of heredity were:

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

The enzymes formed by a bacteriophage that rupture the bacterial cell wall are known as:

Which strain of bacteria possesses a mucous (polysaccharide) coat?