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Why did the mice die when giffith mixed the live R bacteria and the heat killed S bacteria?
Ikd
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Who Was responsible for the experiment with mice and bacteria that led to the hypothesis that when two bacteria were mixed together something was passed to the living cells?
This experiment was conducted by Frederick Griffith in 1928. He observed that when he mixed a harmless strain of bacteria with a heat-killed virulent strain, the harmless bacteria were transformed into a virulent form. This led to the hypothesis that something in the heat-killed bacteria had transformed the live bacteria.
Harmful bacteria in food can be killed by?
Cooking the food. Raising the heat to te proper level kills bacteria.
What was 'transformed' in Griffith's experiment?
In Griffith's experiment, non-pathogenic bacteria were transformed into pathogenic bacteria by being exposed to heat-killed pathogenic bacteria, a process now known as transformation. This led to the discovery of genetic material transfer between bacteria.
What result from Griffith experiment suggested that the cause of pneumonia was not a chemical poison released by the diseases causing bacteria?
The difference between "walking pneumonia" and "true pneumonia".
Why did Griffith need to show that the heat killed bacteria didn't make the mouse die?
Griffith needed to demonstrate that the heat-killed bacteria could cause disease symptoms in mice when combined with live non-pathogenic bacteria. This was to show the concept of transformation, where genetic material can be transferred between different bacteria, ultimately leading to understanding how genetic information is transmitted.
Who Was responsible for the experiment with mice and bacteria that led to the hypothesis that when two bacteria were mixed together something was passed to the living cells?
This experiment was conducted by Frederick Griffith in 1928. He observed that when he mixed a harmless strain of bacteria with a heat-killed virulent strain, the harmless bacteria were transformed into a virulent form. This led to the hypothesis that something in the heat-killed bacteria had transformed the live bacteria.
What is Fredderick Griffith hypothesis?
Frederick Griffith hypothesized that live, harmless bacteria and the heat-killed bacteria were mixed, some factor was transferred from the heat-killed cells into the live cells! it has nothing to do with bats flying thru walls!!
Who showed bacteria is killed by heat?
Louis Pasteur
How are all bacteria toxins killed?
Toxins are not alive, they are just chemicals which hurt us. They can be made by bacteria among other things. The bacteria can be killed by sufficient heat, but not all toxins are destroyed by heat.
Bacteria is killed by what?
Bacteria can be killed by various methods, including heat, antibiotics, disinfectants, and certain chemicals. Heat can denature the proteins in bacteria, leading to their death. Antibiotics target specific pathways or structures in bacteria, preventing their growth and reproduction. Disinfectants and chemicals can disrupt the cell membrane or interfere with the metabolic processes of bacteria, leading to their elimination.
How did Avery and his group I dentist the transformation principle?
Avery and his group identified the transformation principle through a series of experiments in the 1940s. They utilized heat-killed virulent strains of bacteria and mixed them with live non-virulent strains. The resulting transformation of the non-virulent bacteria into virulent forms indicated that some substance from the heat-killed bacteria was responsible for this genetic change. Their work provided strong evidence that DNA was the carrier of genetic information.
Why was the mixture of heat killed s bacteria and r bacteria virulent?
The live R bacteria acquired a capsule and became live, virulent S bacteria.
Kind of bactaria are killed in pasteurization?
pathogenic microbes.Mostly,bacteria with poor heat resistant.
How much bacteria gets killed from steam?
The amount of bacteria killed by steam depends on various factors such as temperature, exposure time, and bacterial species. Steam can be an effective method for killing bacteria as the heat can denature and destroy proteins essential for bacterial survival. However, some heat-resistant bacteria may require higher temperatures or longer exposure times to be effectively killed by steam.
What is the molecule that caused transformation in Griffith's mouse experiment?
The molecule that caused transformation in Griffith's mouse experiment was DNA. When heat-killed S strain bacteria (which had DNA) were mixed with live R strain bacteria (which did not), the DNA from the dead S strain bacteria was able to transfer genetic information to the live R strain bacteria, making them pathogenic.
How did Griffith experiments show that hereditary factor was involved in the bacterial transformation?
Griffith's experiments, conducted in the 1920s, demonstrated that non-virulent strains of Streptococcus pneumoniae could be transformed into virulent strains when exposed to heat-killed virulent bacteria. He observed that when live non-virulent bacteria were mixed with the heat-killed virulent bacteria, some of the non-virulent bacteria took up the hereditary material from the dead bacteria, becoming virulent themselves. This transformation indicated the presence of a "hereditary factor" that carried the information necessary for virulence, laying the groundwork for the later discovery of DNA as the genetic material.
What happened when Griffith injected mice with a mixture of heat-killed pneumonia-causing bacteria and live bacteria of the harmless type?
that it was very gay
