In 1952 Alfred Hershey and Martha Chase used radioactive phosphorus and radioactive sulfur to selectively label the DNA and proteins of bacteriophage T2, a virus that infects bacteria. After incubating the labeled bacteriophage particles with Escherichia coli and separating extracellular phage particles from the bacteria, Hershey and Chase measured the amounts of radioactive phosphorus and sulfur inside infected E. coli cells and in the liquid growth medium outside the E. coli colls Which of the following best explains their results and conclusion? a. Both radioactive DNA and radioactive protein were found in the infected cells; this demonstrates that DNA is the genetic material and its code was used to synthesize proteins.
b. Radioactive DNA was found in the infected cells and radioactive protein was found in the medium outside the cells; this demonstrates OB that the genetic information was used to synthesize proteins.
c. Radioactive protein was found in the intected cells and radioactive DNA was found in the medium outside the cells; this demonstrates that DNA carries the virus' genetic information.
d. Radioactive DNA was found in the infected cells and radioactive protein was found in the medium outside the cells; this demonstrates that DNA carries the virus' genetic information.