Question

e isotopes eventually detected when the radioactively-labeled bacteriophages were introduced to a fresh bacterial culture? In the Hershey-Chase experiment, bacteriophages were produced in either 32P-containing or 35S-containing medium. Where were these isotopes eventually detected when the radioactively-labeled bacteriophages were introduced to a fresh bacterial culture?a. Both 32P and 35S were associated with the phage particles.b. Both 32P and 35S were associated with the bacterial cells.c. The 32P was associated with the culture medium and 35S was associated with the phage particles.d. The 32P was associated with the culture medium and 35S was associated with the bacterial cells.e. The 32P was associated with the bacterial cells and 35S was associated with the phage particles.

Answer 1

Answer:

E. The 32P was associated with the bacterial cells and 35S was associated with the phage particles.

Explanation:

Hershey and Chase's experiment proved that DNA serves as the genetic material of the cell.

This experiment used the bacteriophage which could infect the bacteria by integrating its DNA into the bacterial genome. For this, he used radioactive phosphorus and radioactive sulphur.

Phosphorus is a constituent of the DNA and sulphur is the constituent of the proteins. This means if the DNA is transferred, then radioactive Phosphorus will be transferred but if proteins are transferred then radioactive sulphur is transferred.

He found the radioactive phosphorus attached to the bacteria and sulphur to the phage itself. This suggested that the DNA material is transferred and acts a hereditary material and not the protein.

Thus, Option-E is correct.