$DNA$ was first discovered by

Give scientific reasons: $DNA$ and not $RNA$ is the genetic material in the majority of organisms.

How was it proved that $DNA$ is the genetic material?

The given figure represents the experiment of which scientists?

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

Give an account of the Hershey and Chase experiment. What did it conclusively prove? If both $DNA$ and proteins contained phosphorus and sulphur,do you think the result would have been the same?