Hershey
This presentation is the property of its rightful owner.
Sponsored Links
1 / 16

Hershey's work on T2 phage PowerPoint PPT Presentation


  • 108 Views
  • Uploaded on
  • Presentation posted in: General

Hershey's work on T2 phage. DNA, not protein is hereditary substance. CONTENT. 1.Hershey History. 2. What is T2??. 3. Infective Cycle. 4. Hershey Chase Experiment. 5. Conclusion. Alfred Day Hershey. His best known experiment is Hershey Chase experiment

Download Presentation

Hershey's work on T2 phage

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Hershey s work on t2 phage

Hershey's work on T2 phage

DNA, not protein is hereditary substance


Hershey s work on t2 phage

CONTENT

1.Hershey History

2. What is T2??

3. Infective Cycle

4. Hershey Chase Experiment

5. Conclusion


Alfred day hershey

Alfred Day Hershey

  • His best known experiment is Hershey Chase experiment

  • Concerned the replication of genetic structure of viruses

4 Dec. 1908--- 22 May 1997


Hershey s work on t2 phage

1934 -1950Teaching and research at the Department of Bacteriology1936Held an instructorship in bacteriology and immunology 1936 -1939Work together with Professor J. J. Bronfenbrenner. 1938Became assistant professor 1942Became associate professor


What is t2

What is T2 ?

  • The T2 phage is a strongly toxic bacteriophage and tadpole-shaped virus

  • small virus that infect only bacteria

  • Contain 50% DNA and 50% protein


Hershey s work on t2 phage

Infect E-coli

  • Contains linear double-stranded DNA


Tail fibers of the phage attach to the bacterial cell to initiate infection

tail fibers of the phage attach to the bacterial cell to initiate infection


Hershey s work on t2 phage

Protein coat of the T2 carries the organ of

attachment to bacteria.


Hershey s work on t2 phage

The infective cycle of T2 in E.coil

  • Virus attach to the surface of their host cell(a)


Hershey s work on t2 phage

  • Inject the DNA into the cell(b)


Hershey s work on t2 phage

  • DNA accumulate,other genes are transcribed and translated(C)


Hershey s work on t2 phage

  • DNA and protein are assembled into complete virus (d)


Hershey s work on t2 phage

  • The cell breaks and releases its content of virus(e)


Hershey chase experiment

Hershey ChaseExperiment

  • Radioactive Sulphur (35S)

    non-radioative DNA?

  • Radioactive Phosphorous(35P)

    radioactive DNA?


Hershey s work on t2 phage

Conclusion

DNA is the

GENTIC MARTERIAL!!!


Hershey s work on t2 phage

~THE END~


  • Login