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Terms in this set (142)Beginning with the simplest level of structure, which order of organization of genetic material is CORRECT? Recommended textbook solutions Biology1st EditionKenneth R. Miller, Levine 2,470 solutions How did Griffith determine that the S strain and not the R strain was pathogenic?How did Griffith determine that the S strain and not the R strain was pathogenic? The S strain caused the mice to get pneumonia. In one experiment, Griffith injected heat-killed S strain bacteria into mice.
Which was a conclusion of Griffith'S work with Streptococcus?Griffith concluded that the R-strain bacteria must have taken up what he called a "transforming principle" from the heat-killed S bacteria, which allowed them to "transform" into smooth-coated bacteria and become virulent.
What happened when Griffith injected mice with the pneumonia causing strain of bacteria that had been heatWhat happened when Griffith injected mice with a mixture of heat-killed, pneumonia- causing bacteria and live bacteria of the harmless type? The mice got pneumonia and many died.
What is the key difference between rough and smooth S pneumoniae?The bacteriologists were interested in the difference between two strains of Streptococci that Frederick Griffith had identified in 1923: one, the S (smooth) strain, has a polysaccharide coat and produces smooth, shiny colonies on a lab plate; the other, the R (rough) strain, lacks the coat and produces colonies that ...
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Why were Griffiths S strains able to produce a polysaccharide coat while the R strains could not?
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