The Griffith's experiment used cells that were naturally competent, that is, able to take up DNA...
The Griffith's experiment used cells that were naturally competent, that is, able to take up DNA from the environment without any experimental manipulation. What would you expect his results to be if he had NOT used naturally competent bacterial species?
Select one:
a. Mice in the R strain plus heat-killed S strain treatment would die
b. Mice in the R strain only treatment would die
c. No S strain bacteria would be present in any treatment
d. Mice in the R strain plus heat-killed S strain would not die
e. Mice treated with R strain, but not S strain, would die
Homework Answers
Answer- D. Mice in the R strain plus heat-killed S strain would not die
Only when R strain are taking up S strain DNA and are transformed, then Mouse is killed. If R strain cells are not taking up S strain DNA then, there is no transformation, mice will not die.
R strain- mouse lives ( Non- virulent)
R stain+ S stain - mouse dies
S stain- Mouse dies ( virulent)
R stain+ heat-killed S stain in case of competent cells- Mouse dies
R stain + heat-killed S stain in case of non-competent cells- Mouse lives.
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The Griffith's experiment used cells that were naturally
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A. The bacteriophage would attach to the bacteria and reproduce
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C. The bacteriophage would attach its genes to the bacteria’s
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lytic cycle. Suppose a similar experiment were conducted with a
bacteriophage that uses the lysogenic cycle. How would the effect
on the infected bacteria MOST likely differ?
A. The bacteriophage would attach to the bacteria and reproduce
in the extracellular space.
B. The bacteriophage would become permanently dormant and
unresponsive to environmental cues for reproduction.
C. The bacteriophage would attach its genes to the bacteria’s
DNA, allowing its genes to be...
3. In this experiment, both the tube and the LB-only plates were used as controls to help us validate our transformation results. The left column depicts four different problems or human errors (unknown to the researcher at the time of the experiment) that are possible with this experiment. The right hand side shows four hypothetical experimental results, cach result is the consequence of one error or problem listed on the Jeft. Correctly match the letter (A-D) of the experimental results...
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