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Questions and Answers
If cells were exposed to UV light, the highest frequency of repair would be obtained if the cells were immediately:
If cells were exposed to UV light, the highest frequency of repair would be obtained if the cells were immediately:
- placed in the dark (correct)
- exposed to visible light
- shaken vigorously
- incubated at a temperature below their optimum for growth.
Which factor is essential for the highest frequency of repair after cells are exposed to UV light?
Which factor is essential for the highest frequency of repair after cells are exposed to UV light?
- Exposure to visible light
- Temperature below optimum for growth
- Shaking vigorously
- Immediate placement in the dark (correct)
How can repair frequency be maximized for cells exposed to UV light?
How can repair frequency be maximized for cells exposed to UV light?
- By placing them in the dark (correct)
- By incubating them at low temperature
- By exposing them to visible light
- By shaking them vigorously
All plasmids:
All plasmids:
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Which is true about plasmids?
Which is true about plasmids?
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Study Notes
Effects of UV Light on Cells
- Cells exposed to UV light require specific conditions to obtain highest frequency of... (answer not provided in the text)
- Placing cells in the dark immediately after UV exposure is one of the possible conditions
- Exposure to visible light is another possible condition
- Shaking cells vigorously or incubating at a temperature below optimum for growth are also possible conditions
Characteristics of Plasmids
- Not all plasmids carry genes for antimicrobial resistance
- Not all plasmids encode mechanisms for transmission to other bacteria
- Plasmids do not always occur in multiple copies in the cells
- Plasmids typically code for non-essential functions
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