In chromosomes,the material controlling heredity is

How many strains of bacteria were used in Griffith's experiment?

Which of the following is not correct for a molecule acting as genetic material?

If a virus is grown in a medium containing radioactive sulfur,which of the following will become radioactive?

Who performed the famous "Replica Plating Experiment"?

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?