OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the protein coat from pathogenic cells was able to transform nonpathogenic cells.
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heat-killed pathogenic cells caused pneumonia.
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some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic.
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the polysaccharide coat of bacteria caused pneumonia.
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Detailed explanation-1: -In his work with pneumonia-causing bacteria and mice, Griffith found that. the protein coat from pathogenic cells was able to transform non-pathogenic cells. heat-killed pathogenic cells caused pneumonia.
Detailed explanation-2: -Experiment 4: Griffith mixed his heat-killed, disease-causing bacteria with live, harmless bacteria and injected the mixture into the mice. The mice developed pneumonia and died.
Detailed explanation-3: -What result from Griffith’s experiment suggested that the cause of pneumonia was not a chemical poison released by the disease-causing bacteria? When he took a culture of these cells, heated the bacteria to kill them, and injected the heat-killed bacteria into mice; the mice survived.