By radio·labeling these organisms, Gunther Stent confirmed the double helix structure of DNA (15[1])proposed (15[1])by Watson and Crick, the former of whom belonged to an informal “group” of American scientists named for these organisms. (15[2])Seymour Benzer (15[1])identified (15[2])rII (“r-two”) loci (15[2])that caused rapid function of one of these organisms. Mutations in the f·h·u·A gene conferred resistance (15[1])to one of these organisms contained in the agar of the (*) Luria-Delbrück (10[1]-5[2])experiment. (10[5])By plating (10[1])UV-treated E. coli with its parent (10[1])strain (10[1])on the same plate, (10[2])Esther Lederberg discovered one of these organisms. (10[2])Radioactive phosphorus-32 (10[2])and (10[1])sulfur-35 (10[5]-5[1])were (10[1])used to label the DNA (10[2])and proteins in (10[1])one of (10[1])these organisms in the Hershey-Chase (-5[1])experiment. (10[4]-5[1])For 10 points, T4 and lambda are examples (10[1]-5[1])of what viruses that infect (10[1])bacteria? (10[5])■END■ (10[10])