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Multiple Choice
Choose the incorrect statement about the results of the Hershey-Chase Experiment.
A
Radioactive labeled protein was found in the bacteria.
B
Radioactive labeled DNA was found in the bacteria.
C
DNA was labeled with radioactive phosphorus.
D
Protein was labeled with radioactive sulfur.
E
Radioactive labeled protein was found outside of the bacteria.
Verified step by step guidance
1
Understand the purpose of the Hershey-Chase experiment: It was designed to determine whether DNA or protein is the genetic material that viruses transfer to bacteria.
Recall the methodology: Hershey and Chase used bacteriophages (viruses that infect bacteria) and labeled their DNA with radioactive phosphorus (32P) and their protein with radioactive sulfur (35S).
Analyze the results: After allowing the bacteriophages to infect the bacteria, they used a blender to separate the phage coats from the bacterial cells and then centrifuged the mixture.
Identify where the radioactivity was found: Radioactive phosphorus (32P) was found inside the bacteria, indicating that DNA entered the bacterial cells. Radioactive sulfur (35S) was found in the phage coats, outside the bacteria, indicating that protein did not enter the cells.
Determine the incorrect statement: The statement 'Radioactive labeled protein was found in the bacteria' is incorrect because the radioactive sulfur-labeled protein was found outside the bacteria, not inside.