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What was the purpose of Griffiths 3 experiments in which he injected a mouse with live R S and heat killed S cells?
Wiki User
∙ 12y ago
In Griffith's experiment 1 he injected the mouse with live R cells.
It was not till Griffiths experiment 2 did he injest the mouse with live S cells.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoBecause they wanted to see the reaction of the mice when under the influence.
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∙ 12y agoits when you smell really bad and your affriad of the sun and dont leave your house.
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∙ 13y agoi believe i can fly
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∙ 11y agoTo make waffles
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What effect did an injection of live R bacteria mixed with heat killed S bacteria have on the mice?
The mice injected with mixture died
What is injected in a vaccination?
A weakened form of the virus and if you do not know what a vaccine is it's something that stimulates your cells to stop that virus or disease in the future
How dangerous is smallpox?
It can, if untreated, be fatal. It is very dangerous. small pox was very dangerous as it killed every one who got it. there was a small pox epidemic that killed thousands. a scientist realised that people that had had cow pox (in the same family of disease) were immune to small pox. He carried out a test on a boy with his parents permission, injected him with a small dose of cow pox and then a few weeks later injected him with small pox wih good results. after vaccinations, Britain is now cleared of small pox. that's what Mr Stanton taught me at HMS. ;p That scientist was Edward Jenner.
What did griffin observe when he injected into mice a mixture of heat killed disease causing bacteria and live harmless bacteria?
The mice died. This was a fundamental experiment in the history of genetics and helped to establish that DNA was the information and gene carrier for all life. To understand it a little better it's important to know that the heat killed (virulent) bacteria killed the mice when it was living. And the non-virulent did not. But when combined, the non-virulent absorbed some of the DNA from the virulent and was able to make a protective coat that shielded it from the animals immune system... allowing it to kill the mice.
What was the purpose of Frederick Griffith's studies?
Griffith discovered transformation. Transformation is what we would today describe as the motion of DNA from one cell to another. But in those days, it was not known that DNA was the genetic material. All that was known was that something caused transformation.S virulent strains of Streptococcus pneumoniae were injected into mice. The mice promptly perished from pneumonia due to the bacterial virulence. Second, mice had R nonvirulent strain of Streptococcus pneumoniae injected. The mice were fine afterwards due to the nonvirulence of the bacterium. Heat killed S virulent bacteria had no effect either. However something rather sinister happened when S virulent (heat killed) and R nonviruent were mixed in together and entered the mice.The S virulent were dead and could do nothing. But it appeared a transforming medium must have traversed from them to the R nonvirulent (live) strain. The R nonvirulent became S virulent and killed the mice ferociously. Something very odd had happened. A transforming principle. Transformation had been discovered.nicely put, but you missed some points.Fredrick Griffith was a bacteriologist who discovered transformation. Transformation is what we would today explain as the movement of DNA from one cell to another. But back in those days, DNA was not known as a genetic material; all they know was that something caused transformation. In his experiment, Griffith found that if the dangerous S bacteria strains of Streptococcus pneumonia (that he put in a capsule to stop the bodies defense systems) were injected into mice, then the mice quickly died from pneumonia because of the bacterial poisoning. The other mice that were infected with the R bacteria were fine. In order to see if the capsules were killing the mice, Griffith injected dead S bacteria in the mice, but that had no effect. So, afterwards, he injected the mice with heat-killed S bacteria, but that had no effect either. So now, Griffith knew that the capsule did not kill the bacteria. The purpose of the heat-killed bacteria was so they could no longer reproduce. However something pretty disturbing happened when the previously harmless heat-killed S bacteria and previously harmless R bacteria were mixed in together and injected into the mice, the mice died. Griffith, mystified, checked the blood of the dead mice and found that the harmless R bacteria had aqquierd capsules. So, in other words the harmless R bacteria had become the harmful S bacteria. Griffith had discovered what we now call "transformation".
What results from Griffiths experiment suggested that the cause of pneumonia was not a chemical poison by the disease-causing bacteria?
To find out, he took a culture of these cells, heated the bacteria to kill them, and injected the heat-killed bacteria into the mice.
What result from griffiths experiment suggested that the cause of pneumonia was not a chemical poison released by the disease bacteria?
To find out, he took a culture of these cells, heated the bacteria to kill them, and injected the heat-killed bacteria into the mice.
What are 4 steps in Griffith's experiments?
S Strain ---> inject into mice ---> Mice Die R Strain ---> inject into mice ---> Mice Live Griffith was able to kill bacteria by heating them. He observed that heat-killed S Strain bacteria injected into mice did not kill them. When he S Strain (heat Killed) ---> Injected into mice ---> Mice Live S Strain ( heat Killed) + R Strain (Live) ---> Injected into mice ---> Mice Die
What purpose did boiling the meat serve in both Spallanzani and Pasteur experiments?
Boiling the meat broth killed any existing microorganisms.
What result from Griffiths experiment suggested that the cause of pneumonia wasnt a chemical poison?
To find out, he took a culture of these cells, heated the bacteria to kill them, and injected the heat-killed bacteria into the mice. The Mice survived, suggesting that the cause of pneumonia was not a chemical poison released by the disease-causing bacteria.
What purpose did boiling the meat broth serve in both spallanzani and pasteur experiments?
Boiling the meat broth killed any existing microorganisms.
Why are the experiments dr James lind did on froghs important to the novel?
He killed them!
How fast will you be killed from a viper snake?
It depends - on how much venom is injected, and how far away you are from help !
How many Marmoset monkeys are killed each year?
around 30 or so for experiments!
Who was the first person to die performing electric experiments?
Professor Georg Wilhelm Richmann, of Saint Petersburg, Russia, became the first recorded person to be killed while performing electrical experiments when he was struck and killed by a globe of ball lightning in 1753.
What did they do at the Auschwitz Concentration camp?
They Killed people by: Starving Dehydrating Beatings Experiments Shootings Gassing
A preparation of killed or weakened pathogens injected or taken orally to stimulate the body to produce antibodies is called a?
vaccine
