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An enzyme that repairs thymine dimers in visible light in E. coli
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E. coli cells were spread on two agar plates [one containing only agar (plate 1) and the second containing streptomycin (plate 2) which kills all cells except those that are resistant mutants]. Both plates were allowed to grow for several generations. Cells were collected from the agar plate WITHOUT streptomycin and spread again on a fresh agar plate containing streptomycin (plate 3). More mutants were observed on plate 3 than were observed on plate 2. The experiment demonstrates
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E.coli & -----------are normally referred to as fecal & non- fecal contaminants?
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An individual regulatory subunit that dictates the substrate selectivity of the enzyme ends in lethality
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An individual regulatory subunit that dictates the substrate selectivity of the enzyme brings about lethality
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An individual regulatory subunit that dictates the substrate selectivity of the enzyme results lethality
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