would you expect XL1 Blue II cells to survive exposure to UV radiation? Why or why...
Homework Answers
No beacuse , these cells have mutated RecA . RecA codes for a protein involved in repair damage to DNA caused by UV , so it won't be able to perform DNA repair mechanism therefore it will not survive after exposure to UV radiation .
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would you expect XL1 Blue II cells to survive exposure to UV
radiation? Why or why...
Which culture should be able to survive the longest exposure to UV (SA or BS)? Why?...
Which culture should be able to survive the longest exposure to UV (SA or BS)? Why? 7. Do you expect to see a difference between the growth on the side of the plate that was under the index card and the side that was open? If so, explain what you expect to see. 8. Some cells have a means of protecting themselves against radiation. Can you name a few structures that might help protect a cell from UV light?
You used E.coli, Staphylococcus aureus, and XL1-Blue II cells for the UV experiment. Which bacteria are...
You used E.coli, Staphylococcus aureus, and XL1-Blue II cells for the UV experiment. Which bacteria are the most UV sensitive and which bacteria are the least sensitive of these three? Give a detailed explanation!
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth?...
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth? A. It damages DNA, inhibiting transcription and replication. B. It causes the cell membrane to rupture. C. It creates ions that damage biomolecules. D. It raises the temperature, killing temperature sensitive bacteria.
Results A. Effect of UV Radiation Record the results for each plate at follows (see images...
Results A. Effect of UV Radiation Record the results for each plate at follows (see images below): (-) no growth 1+ light growth 2+ medium growth 3+ heavy growth Also, note any differences in appearance of growth on cach of the plates. 15 30 60 ates) Bacteria Lid off UV light exposure time Lid off Lid off Lid off 15 sec 30 sec 60 sec O sec Lid on 60 sec (control) Serratia marcescens Based on these results, answer the...
The number of deaths attributed to UV radiation in African countries in the year 2002 is...
The number of deaths attributed to UV radiation in African countries in the year 2002 is given in table #3.2.19 ("UV radiation: Burden," 2013). Table #3.2.19: Number of Deaths from UV Radiation 50 84 31 338 6 504 40 7 58 204 15 27 39 1 45 174 98 94 199 9 27 58 356 5 45 5 94 26 171 13 57 138 39 3 171 41 1177 102 123 433 35 40 456 125 a.) Using technology, find...
Briefly explain what you would expect to see in the UV-visible spectra of the first two...
Briefly explain what you would expect to see in the UV-visible spectra of the first two compounds you will prepare in this experiment, [Ni(NH3)6][BF4]2 and [Et4N]2[NiCl4]. Which would you expect to give the stronger absorptions, and why?
Electromagnetic Waves UV Radiation Some of us are all too familiar with the ill- effects of...
Electromagnetic Waves UV Radiation Some of us are all too familiar with the ill- effects of over-exposure to ultraviolet (UV) electromagnetic radiation, namely, sunburns (solar erythema). UV radiation can kill the skin cells immediately below the surface (part of the epidermal layer). Over the course of several minutes or several hours, as enough skin cells are killed or damaged, the body's natural immune response is triggered. The body responds to the damage with increased blood flow to the capillary bed of...
1. A group of non-dividing cells are irradiated with UV and then left to recover for...
1. A group of non-dividing cells are irradiated with UV and then left to recover for 2 hours arrested in G1. After two hours they are allowed to undergo a round of replication. a. After the recovery, do you expect there to be inheritable mutations present in these cells? Why or why not? b. After the single round of replication do expect both daughter cells to carry the same heritable mutation? Why or why not?
Why are some cells eliminated and some cells survive in negative selection for immature B cells?
Why are some cells eliminated and some cells survive in negative selection for immature B cells?
What is the effect of UV radiation on bacterial growth and how do things such as...
What is the effect of UV radiation on bacterial growth and how do things such as duration of exposure contribute to the growth patterns. Also, what is a possible experiment you could perform to re-confirm or validate your expectations?
In Experiment 1, why is exposure to UV radiation an effective method of controlling bacterial growth? A. It damages DNA, inhibiting transcription and replication. B. It causes the cell membrane to rupture. C. It creates ions that damage biomolecules. D. It raises the temperature, killing temperature sensitive bacteria.
Results A. Effect of UV Radiation Record the results for each plate at follows (see images below): (-) no growth 1+ light growth 2+ medium growth 3+ heavy growth Also, note any differences in appearance of growth on cach of the plates. 15 30 60 ates) Bacteria Lid off UV light exposure time Lid off Lid off Lid off 15 sec 30 sec 60 sec O sec Lid on 60 sec (control) Serratia marcescens Based on these results, answer the...
1. A group of non-dividing cells are irradiated with UV and then left to recover for 2 hours arrested in G1. After two hours they are allowed to undergo a round of replication. a. After the recovery, do you expect there to be inheritable mutations present in these cells? Why or why not? b. After the single round of replication do expect both daughter cells to carry the same heritable mutation? Why or why not?
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