A students was repeating the experiments of Alfred Hershey and Maltha Chase (1952). Results obtained by him are shown in the given figure. Select the biomolecule that was radio actively labelled by the students for his experiment.
1
DNA of bacteriophage with radio active Phosphorous
2
Plasmid DNA of E. coli with radio active Sulphur
3
Proteins of bacteriophage with radio active Sulphur
4
Chromosomal mol DNA of E. coli with radio active Sulphur