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calculate the final concentration of each of the components in the reaction mixture described in the folliwing experiment:
The enzyme tyrosinase is found in large concentrations in plant tissues. This enzyme is responsible for the browning of peeled potatoes and bruised fruits. In an assay to determine the activity of the tyrosinase in a potato extract, the following reaction mixture was prepared:
1ml of potato extract, 2ml of 5mM dopa (3,4-dihydroxyphenyalanine), 0.5ml of 20mM citrate buffer, 0.5ml of 1% hydroquinone and 2ml distilled water.
What are the final concentrations of dopa, citrate buffer, and hydroquinone in the reaction mixture?
Determine which population size exhibited the greatest amount of variation in allele frequency during these stimulations?
Why does the the frequency of action potentials increase when the stimulus intensity increases?
Acetylcholine acts at the G-protein-linked receptor on heart muscle to make the heart beat more slowly by the effect of the G protein on a K+ channel. Which one or more of next would enhance this effect of acetylcholine.
Drug X is used to suppress the secretion of CRH. Two patients with hypersecretion of cortisol are given Drug X. Patient A's cortisol secretion level remains elevated, but patient B's cortisol secretion level falls to normal levels.
The restriction enzyme ECOR I cuts DNA leaving 5' overhangs, Pst I leaves 3' overhangs after cutting DNA and SMA I leaves blunt ends on the fragments it produces.Indicate wheter DNA ligase can join the pieces of DNA.
1. In a genetic mapping experiment in corn, genes A and B appear to be 50 map units apart. You know that gene A is on Chromosome 12. Do you think that this means that gene B is on chromosome 12 also?
The Heliconius butterflies are a classic example of Müllerian mimicry. Which of the following defines a pair of species exhibiting Müllerian mimicry and which of the following defines an obligate mutualistic relationship
A five year old girl displayed increased apetite, increased urinary frequency and thirst. Her physician suspected new onset diabetes mellitus & confirmed that she had elevated urine glucose and ketones.
What is the difference between lactococcus lactis and staphylococcus epidermis? I am doing a lab and I've found out that my bacteria are gram positive cocci that ferment lactose and mannitol. I have it narrowed down to lactococcs lactis and staphyloc..
Describe why asexually reproducing organisms are generally found in environments that do not change very much through time, while sexually reproducing organisms are very successful in environments.
Albinism is an autosomal recessive trait in the clouded salamander (Aneides ferreus). In the main cave population at Oregon Caves National Monument, 100 salamanders are albino while 900 individuals are not (891 AA and 9 Aa). Assume that this popul..
The following information came from an undisclosed area of the globe. Your mission, should you choose to accept it, is to determine where this climatological data set originated.
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