Biology, 30.10.2019 04:31 amorosoavap5cejz
Suppose that gene x is induced in e. coli cells when they are treated with high levels of ethanol. a mutation in region 1 in the upstream region of gene x results in high-level expression under basal conditions, and a mutation in region 2 results in an uninducible gene. what would you expect from a strain in which both regions 1 and 2 are mutated?
Answers: 1
Biology, 22.06.2019 06:50
The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).
Answers: 1
Biology, 22.06.2019 16:30
Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england
Answers: 1
Suppose that gene x is induced in e. coli cells when they are treated with high levels of ethanol. a...
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