Question

In: Chemistry

Why do bacterial cells exposed to visible light following a significant UV radiation have a greater...

Why do bacterial cells exposed to visible light following a significant UV radiation have a greater survival rate than cells kept in the dark? Explain the complcations arising from UV radiation and why the light is adventageous.

Solutions

Expert Solution

Dear friend your answer is

Ultravioloet (UV) light can damage DNA by causing dimerization of thymidylate residues. One mechanism for repairing thymine dimers is enzymatic photoreactivation, catalyzed by DNA photolase. This enzyme uses energy from visible light to cleave the dimer and repair DNA. Thus cells that are exposed to visible light following UV irradation are better able to repair DNA than cells kept in the dark.

thank you, all the best.

queen_honey_blossom answered 2 years ago
Next > < Previous

Related Solutions

Why do most human bodies tan when exposed to UV light? Explain the possible relationships between...
Why do most human bodies tan when exposed to UV light? Explain the possible relationships between ultraviolet light, vitamin D, folic acid and melanin production with regard to the evolution of various skin colors in human population
Explain why sulfanilic acid and N,N-dimethylaniline absorb UV light while methyl orange absorbs visible light.
Explain why sulfanilic acid and N,N-dimethylaniline absorb UV light while methyl orange absorbs visible light.
the speed of gamma radiation is higher than lower than same as visible light
the speed of gamma radiation is higher than lower than same as visible light
Infrared radiation is also called IR. Describe how it is different from visible light. What emits...
Infrared radiation is also called IR. Describe how it is different from visible light. What emits IR? Can animals use it? Explain how emission of IR sometimes “wastes” energy. Give examples showing how IR is used in modern technology.
CO2 passes short wave length light (visible) but blocks long wave length radiation (IR).
CO2 passes short wave length light (visible) but blocks long wave length radiation (IR). Explain how adding CO2 to an atmosphere increases the surface temperature of a planet. Consider the temperature of the sources of radiation in and out.
Infrared radiation is also called IR. Describe how it is different from visible light. What emits...
Infrared radiation is also called IR. Describe how it is different from visible light. What emits IR? Can animals use it? Explain how emission of IR sometimes “wastes” energy. Give examples showing how IR is used in modern technology.
why does the measurement of fluorescence data require a more intense source of uv/visible spectroscopy? specific....
why does the measurement of fluorescence data require a more intense source of uv/visible spectroscopy? specific. b) what is the typical source for spectofluorometer? c) for the photomuiltiplier transducer what is the mode off operation used signal to noise?
Explain, from a molecular point of view, why a conjugated diene absorbs UV radiation while an...
Explain, from a molecular point of view, why a conjugated diene absorbs UV radiation while an alkene and cyclohexane do not.
0-9. GREENHOUSE EFFECT CO2 passes short wave length light (visible) but blocks long wave length radiation...
0-9. GREENHOUSE EFFECT CO2 passes short wave length light (visible) but blocks long wave length radiation (IR). Explain how adding CO2 to an atmosphere increases the surface temperature of a planet. Consider the temperature of the sources of radiation in and out.
1. why might some antibiotics show greater evidence of bacterial resistance than others? 2. do any...
1. why might some antibiotics show greater evidence of bacterial resistance than others? 2. do any of the results obtained suggest that bacterial genes that confer resistance to certain antibiotics also work against chemically similar antibiotics? 3. Staphylococcus epidermidis is gernally not considered a harmful species of bacteria; in fact, it may be beneficial to humans to have this organism living on our skin. even so, why should we be concerned that this species shows resistance to a variety of...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT