The relationship between genes and $\text{DNA}$ is best understood by $.........$ ?

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

The hypothesis established by the 'transformation' experiments using $Pneumococcus$ bacteria is that:

Which of the following acts as genetic material?

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

In $Streptococcus$ $pneumoniae$,which of the following statements is correct?