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Why was Alfred Hershey and Martha Chase's experiment so important?
Hershey and Chase's experiment using bacteriophages proved that DNA, not protein, is the genetic material in cells. This discovery was a key milestone in understanding how genetic information is passed from one generation to the next. It laid the foundation for the field of molecular biology.
How did Hershey and Chase's research with bacteriophages help confirm that DNA is in genetic material?
They found that all of the viral DNA and little of the protein had entered E. coli cells. Then they concluded that DNA is the hereditary molecule in viruses.
Describe the experimental design that allowed Hershey and Chase to distinguish between the two options for genetic material?
Hershey and Chase knew that the particular phage they worked with has two basic components: DNA on the inside, coated with protein on the outside. In their expt theylabelled phages with radioisotopes . For one batch of infecting phages, they used a radioactive isotope of sulfur to label only the phages' protein coats.In another batch of phages, they used a radioactive isotope of phosphorus to label only DNA. Next, they allowed each batch of phages to infect separate cultures of nonradioactive bacterial cells. They then whirled each culture in a blender to shake loose any parts of the phages that remained outside the bacterial cells. Result of expt. confirmed that only DNA of phage entered bacteria .
What role did studying bacterial viruses play in identifying genetic material?
My biology book says: Hershey and Chase's experiment with bacteriophages confirmed Avery's results, convincing many scientists that DNA was the genetic material found in genes- not just in viruses and bacteria, but in all living cells. Hoped this helps :)
Why did DNA in Hershey-Chase experiments end up in the supernatant?
In the Hershey-Chase experiments, DNA ended up in the supernatant because it is a large molecule that remained inside the bacterial cells, while the protein coat of the phage (which was labeled with radioactive sulfur) was stripped off and left outside the cell. This separation allowed researchers to conclude that DNA is the genetic material responsible for viral replication.
Why was Alfred Hershey and Martha Chase's experiment so important?
Hershey and Chase's experiment using bacteriophages proved that DNA, not protein, is the genetic material in cells. This discovery was a key milestone in understanding how genetic information is passed from one generation to the next. It laid the foundation for the field of molecular biology.
How did the Hershey and chase experiment produce evidence the DNA and not protein is the hereditary material in viruses?
They found that all of the viral DNA and little of the protein had entered E. coli cells. Then they concluded that DNA is the hereditary molecule in viruses.
What might Hershy and Chase have concluded if they had found 32P and 35S in the bacterial cells?
They might have concluded that both protein and DNA transmitted hereditary material. The 32P was a radioisotope in DNA, and the 35S was a radioisotope in proteins. They were used to track the DNA and proteins to see if they were injected by a virus into a bacterium.
How did the Hershey and Chase experiment produce evidence that DNA and not protein is the hereditary material and viruses?
They found that all of the viral DNA and little of the protein had entered E. coli cells. Then they concluded that DNA is the hereditary molecule in viruses.
These scientists used a common kitchen appliance to help show that phage DNA carries instructions ti make new phage particles?
The scientists used a blender to break open the bacterial cells infected by phages, releasing the phage DNA. This demonstrated that the phage DNA carries instructions to produce new phage particles when introduced into a host bacterial cell.
How did Hershey and Chase's research with bacteriophages help confirm that DNA is in genetic material?
They found that all of the viral DNA and little of the protein had entered E. coli cells. Then they concluded that DNA is the hereditary molecule in viruses.
Describe the contributions of hershey and chase to the understanding that DNA is the genetic material?
Hershey and Chase conducted the famous Hershey-Chase experiment in 1952, which confirmed that DNA, not protein, is the genetic material in viruses. They used radioactive labeling to track the transmission of genetic information during viral infection of bacterial cells. This provided crucial evidence supporting the role of DNA as the carrier of genetic information.
Describe the experimental design that allowed Hershey and Chase to distinguish between the two options for genetic material?
Hershey and Chase knew that the particular phage they worked with has two basic components: DNA on the inside, coated with protein on the outside. In their expt theylabelled phages with radioisotopes . For one batch of infecting phages, they used a radioactive isotope of sulfur to label only the phages' protein coats.In another batch of phages, they used a radioactive isotope of phosphorus to label only DNA. Next, they allowed each batch of phages to infect separate cultures of nonradioactive bacterial cells. They then whirled each culture in a blender to shake loose any parts of the phages that remained outside the bacterial cells. Result of expt. confirmed that only DNA of phage entered bacteria .
What did Hershey and chase find through their experiment with infected bacteria?
The genetic mateial is made of DNA and not of proteins
Why did Hershey and Chase choose to use viruses in their experiments?
Hershey and Chase chose to use viruses in their experiments because viruses are simple and can easily infect and replicate within host cells, making them ideal for studying the process of genetic material transfer.
What did Hershey and chase show about genetics?
Hershey and Chase's experiment using T2 bacteriophages demonstrated that DNA, not protein, is the genetic material responsible for the inheritance of traits in organisms. This experiment provided strong evidence supporting the role of DNA as the molecule that carries genetic information and can be replicated and passed on from generation to generation.
Hershey and Chase use what organism to show that DNA is the molecule that stores genetic information in living cells?
They used the T2 phage in their Blender experiment.
