What is a bacteriophage?

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

The result of which of the following reaction experiments carried out by Avery et al. on $Streptococcus \text{ } pneumoniae$ has proved conclusively that $DNA$ is the genetic material?

Which of the following radioisotopes is not suitable for $DNA$ labeling-based studies?

Who among the following scientists developed the cytochemical technique for the detection of $DNA$?

Select the correct statement for the transformation experiment.
$S$-strain (heat-killed) + $R$-strain (live) $\rightarrow$ (injection into mouse) $\rightarrow$ ?