Discussion
The overall conclusion of the Hershey-Chase experiment was that
Answer: A
Correct answer: DNA was responsible for heredity
Hershey and Chase labelled phage protein with 35S and phage DNA with 32P, then let the phages infect bacteria and sheared off what remained outside. The 32P entered the cells while the 35S stayed outside, so it was the DNA, not the protein coat, that carried the genetic instructions. The A:T ratio result belongs to Chargaff.
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