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In their experiments Hershey and Chase put special atoms called what into the DNA and protein of viruses?
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In their experiments Hershey and chase put special atoms call Into the DNA and protein of viruses?
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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.
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 feature of the physical organization of bacteriophage t2 made it suitable for use in the hershey chase experiments?
The virus had a protein coating which remained outside of the cell when the DNA from the virus was injected into the cell. So they were able to see that DNA was carrier of inheritance due to the fact that the protein never entered the cell that produced new viruses.
Who is experiment demonstrated that DNA is the molecule of heredity?
The Avery and Hershey-Chase Experiments • Alfred Hershey and Martha Chase provided the final experimental evidence that pointed to DNA as the hereditary material the team studied viruses that infect bacteria -the structure of these viruses is very simple: a core of DNA surrounded by a coat of protein -the viruses attach themselves to the surface of bacteria cells and inject their genes into the interior • the infected bacterial cell is then forced to make hundreds of copies of new viruses, which then burst out of the cell to infect new cells. • Hershey and Chase used radioactive isotopes to "label" or tag the DNA and the protein of the viruses -some viruses were grown so that their DNA contained radioactive phosporous (32P) -other viruses were grown so that their protein coats contained radioactive sulfur (35S) After the labeled viruses were allowed to infect bacteria, only the viruses with 32 P had labeled tracer in their interior • The conclusion was that the genes that viruses use to specify new viruses are made of DNA and not protein
Where would a medical researcher obtain viruses for experiments?
Places like the Centers for Disease Control (CDC) have viruses preserved in special containers for just such purposes.
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.
What did hershey and chase know about bacteriophages that led them to use these viruses in their DNA experiment?
Bacteriophages are made up of little more than a DNA molecule and surrounded by a protein coat
Do viruses have a protein coat?
no
What did Hershey and Chase show the genetic material of the t2 bacteriophage was?
DNA is the genetic material. However, Hershey-Chase also stated that some little sulfur containing material also entered the bacterial cell. Looking at these two conclusions, Hershey-Chase could not reach a definite conclusion as to whether DNA or Protein contains the genetic material. The conclusion came from Watson-Crick who stated that the sulfur containing material could have entered the cell due to the fact that DNA replication and subsequently translation of the mRNA leads to the synthesis of sulfur containing protein which were found in the bacterial cell.
Are viruses unicellular?
Viruses are DNA wrapped up in protein.
Is there a cell membrane in viruses?
Viruses dont have a cell membrane. Instead, they have a protein sheath.
