AP BIOLOGY

Detailed explanation-1: -Hershey and Chase concluded that protein was not genetic material, and that DNA was genetic material. Unlike Avery’s experiments on bacterial transformations, the Hershey-Chase experiments were more widely and immediately accepted among scientists.

Detailed explanation-2: -Hershey and Chase concluded that DNA, not protein, was the genetic material. They determined that a protective protein coat was formed around the bacteriophage, but that the internal DNA is what conferred its ability to produce progeny inside a bacterium.

Detailed explanation-3: -Solution : Generally proteins contain sulphur but not phosphorous and nucleic acid (DNA) contains phosphorous but not sulphur. Hence Hershey-Chase used radioactive isotopes of sulphur S) and phosphorus (P) to keep separate track of viral protein and nucleic acid in culture medium.

Detailed explanation-4: -Hershey and Chase used a radioactive sulfur isotope to label the phage protein.