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What was Griffith's surprising observation in his experiment?
What was Griffith's surprising observation in his experiment?
- The disease-causing bacteria were not found in the lungs of the injected mice.
- The heat-killed, S-type bacteria transformed into live, disease-causing bacteria. (correct)
- The mice developed pneumonia and died after being injected with harmless bacteria.
- The injected mice were completely immune to any form of bacteria.
What did Griffith conclude was responsible for changing harmless bacteria into disease-causing ones?
What did Griffith conclude was responsible for changing harmless bacteria into disease-causing ones?
- Mixing two types of bacteria caused an explosion in the laboratory mice.
- The mice developed immunity to all forms of bacterial infections.
- Information contained in the heat-killed, S-type cells passed onto the living R-type cells. (correct)
- A chemical compound transferred from live, harmless bacteria to heat-killed, S-type bacteria.
Why did Griffith refer to the process as 'transformation'?
Why did Griffith refer to the process as 'transformation'?
- The chemical compound was transformed into a gene during the experiment.
- Harmless bacteria were permanently changed into disease-causing ones. (correct)
- The mice were transformed into a different species after being injected.
- The live, harmless bacteria transformed into heat-killed, S-type bacteria.
Why did Griffith conclude that the transforming factor had to be a gene?
Why did Griffith conclude that the transforming factor had to be a gene?
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What was Griffith's main inference about how the disease-causing ability passed from heat-killed bacteria to harmless ones?
What was Griffith's main inference about how the disease-causing ability passed from heat-killed bacteria to harmless ones?
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