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Where was the radioactive sulfur found at the end of experiment one in the hershey-chase experiment?
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Does sulfur become radioactive?
Ordinary sulfur found in nature is stable, but there are synthetic isotopes of all elements, including sulfur.
What was the goal of the Hershey-Chase experiment?
- A series of experiments conducted in 1952 by Alfred Hershey and Martha Chase confirming that DNA was the genetic material in cells - The experiment was conducted using T2 phage; a virus that infects bacteria. They do so by attaching to the surface of a bacterium and injecting its genetic material into the bacteria. The structure had recently been elucidated by electron microscopy. - The 1st experiment- Phage DNA was labeled with radioactive 32P. Phosphorous is an important component of DNA which is not found in Amino Acids; protein building blocks. - The phages were allowed to infect E.coli bacteria and through a series of elegant experiments they were able to observe transfer of labeled phage DNA into the cytoplasm of the bacteria. - In the second experiment, they labeled phages with radioactive Sulfur 35 which is found in amino acids cysteine and Methionine. After infection of E.coli, they sheared off the phage protein shells from the infected cells using high speed blender and centrifugation to separate. - After centrifugation, the radioactive sulfur was found in the protein portion confirming the hypothesis that the genetic information transferred was DNA and not protein
Is mendelevium found in the Earth's crust?
Mendelevium is an artificial element, toxic and radioactive, difficult to obtain - only some atoms per experiment.
What did hershey and chase find through their experiment with virus-infected bacteria?
The idea of their experiment was to determine what kind of macromolecule was the genetic material, DNA or proteins. Bacteriophages, viruses that infect bacteria, were known to carry all of the information needed to make themselves, but using the genetic machinery of their hosts. Based on this, they were used as a simple system that should be governed by the same principals as the genetic information of the bacteria itself. At the time it was known that nearly all phosphorus in macromolecules is found in nucleic acid, and nearly all sulfur is found in proteins (methionine and cycteine). So if you grow cells in radioactive isotopes of phosphorus, the nucleic acids (e.g. DNA) become radioactive, and if you grow cells in radioactive sulfur, proteins become radioactive. Sorry, there's more. Folks studying infection of bacteria by phage found that most of the virus was a "package" that never entered the cell. So if they mixed phage with bacteria and waited 15 minutes and then put the mix in a blender for a few seconds, the packages that had been attached to the outside of the bacteria get ripped off and can be searated from the bacteria. While the packages are no longer attached to the bacteria, the bacteria are already infected, so the virus genes must already be inside. Now the experiment: Hershey and Chase infected bacteria with phage with racdioactive proteins (sulfur) or in a separate experiment radioactive DNA (phosphorus). The bacteria was mixed with virus for 15 minutes, then whoosh, frappe! They then separated the bacteria from the viruses that had not infected bacteria and empty packages, and asked what kind of radioactive macromoleules were able to get inside the bacteria following the short incubation. In the sulfur experiment , the bacteria were NOT radioactive so proteins appeared to not enter the bacteria during this short time frame. In the phosphorus experiment, the bacteria became radioactive after a short incubation, meaning the DNA of the phage had entered the bacteria in the same time frame as the genetic material. This was consistent with DNA being the genetic material of bacteriophage.
Can silver be found in sulfur?
Sulfur is an element and as such no silver would be found in pure sulfur except as a trace element.
Is sulfur found pure or an ore?
Sulfur is found both "pure" (elemental Sulfur)or as an ore(sulfur compounds). It occurs commonly in either form.
What are the products of oxygen and sulfur?
sulfur is found in some products like drugs sulfur is found in some products like drugs
What chemical is found in protrin but not in dna?
Phosphorous in not found in any amino acid, the building blocks of protein. ( sulfur is not found in DNA, which lead to and elegant experiment with isotopes of these elements and the differentiation of them, one being the genetic material-Hersey and Chase )
How common is sulfur in nature?
Sulfur is commonly found in volcanoes
Where can information about sulfur be found?
Sulfur is a pale yellow solid that is essential to life. Information about sulfur can be found online. The Web Elements site offers basic information and classification of sulfur.
What was found out in an experiment?
it depends on the experiment
Is rutherfordium radioactive?
Rutherfordium is not found in nature. It is a radioactive synthetic element.
