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Answer: radioactive bacteriophage DNA was found in the cytoplasm of bacterial cells
The results of the Hershey and Chase experiments suggested that DNA was the genetic material because radioactive bacteriophage DNA was found in the cytoplasm of bacterial cells.
- Hershey and Chase showed that DNA (instead of proteins) is the hereditary material that carries the information required to synthesize all materials required by the cells of organisms.
- Hershey and Chase marked bacteriophages by using radioactive isotopes of both phosphorus (present in nucleotides, DNA) and sulfur (present in amino acids, proteins) in those phages.
- They observed in the offspring bacteria that phage DNA (marked with phosphorous) was present in the bacterial cells while phage proteins were not, thereby concluding DNA is the genetic (hereditary) material.
In conclusion, the results of the Hershey and Chase experiments suggested that DNA was the genetic material because radioactive bacteriophage DNA was found in the cytoplasm of bacterial cells.
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