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What was the different about the S bacteria and R bacteria?
the conversion of R forms of one type into S forms of a different type
Why was the mixture of S bacteria and R BACTERIA virulent?
The live R bacteria acquired a capsule and became live, virulent S bacteria.
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.
What did fred griffith find to be true after his experiment with the S and R strains of bacteria?
Fred Griffith found that genetic information could be transferred between different strains of bacteria, specifically between the harmless R strain and the virulent S strain of bacteria. This led to the discovery of transformation, a process where genetic material is exchanged between bacteria.
Why were the S bacteria not the R bacteria virulent?
The S bacteria are surrounded by a capsule, so it is not engulfed by the host's white blood cells. That means that it is able to proliferate and spread. The R bacteria lack the capsule (like the mutant S bacteria), so the white blood cells are able to detect and eliminate them.
What is the difference between r and s bacteria?
R bacteria have a rough appearance due to the presence of a sugar capsule on their outer surface, making them resistant to the immune system. S bacteria are smooth in appearance and lack the protective capsule, making them vulnerable to the immune system. This difference in structure affects the virulence and pathogenicity of the bacteria.
Why were the S bacteria but not the R bacteria virulent?
The S bacteria possess a protective polysaccharide capsule that helps them evade the immune system, allowing them to survive and cause infection. The R bacteria lack this capsule and are easily targeted and eliminated by the immune system, thus they are not virulent.
Which type of bacteria caused disease the S form or R form?
The S form of bacteria typically causes disease, as it has a polysaccharide capsule that aids in virulence and evasion of the immune system. The R form does not have this capsule and is usually avirulent.
The s strain and the r strain of S pneumoniae are different in that?
The S strain produces a capsule but the R strain does not
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.
What is the name of the process that was involved in changing griffith's r bacteria to s bacteria?
The process is called transformation, and it was the first direct evidence that genetic information could be transferred between bacteria. In Griffith's experiment, the heat-killed S strain released its genetic material, which was then taken up by the live R strain, converting it into the deadly S strain.
What did Griffith find to be true after his experiments with the s and r strain of bacteria?
Griffith hypothesized that a chemical component from the virulent S cells had somehow transformed the R cells into the more virulent S form.
