Which of the following radioactive isotopes were utilised for labelling protein and $DNA$ in transduction experiment respectively?

The unequivocal proof of $DNA$ as the genetic material came from the studies on a

Describe Hershey – Chase experiment or How it was proved the DNA is genetic material ?
 

Write a comparative note the properties of $DNA$ and $RNA.$
 

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