In an experiment like that of the 1952 Hershey and Chase experiments,³⁵S was added to a phage replicating within its bacterial host.The new phage particles were carefully isolated and used to infect fresh bacterial cells in the absence of any radioisotopes.Where would you expect to find the ³⁵S radioisotope immediately after infection? A)in the phage ghosts outside the bacterial cells B)incorporated into the bacterial matrix proteins C)incorporated into the bacterial DNA D)inside the bacterial cells,but separate from the bacterial DNA E)inside the bacterial cells,but separate from the bacterial proteins

Question

Quizplus · Accepted Answer

The ³⁵S radioisotope labels the sulfur in the protein coat of the phage. After infection, the protein coat remains outside the bacterial cell as a phage ghost, so the ³⁵S would be found there.

In an Experiment Like That of the 1952 Hershey and Chase