6. In order to label the coat alone but not the nucleic acid the bacteriophage should be grown on E. coli cells previously cultured on a medium containing:
Explanation:Sulfur-35 (35S) is used to label proteins because sulfur is found in the amino acids methionine and cysteine, which are components of proteins. Phosphorus-32 (32P) would label nucleic acids, not the protein coat.