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In the human body, the potassium ion can pass easily through cell membranes, yet the potassium ion concentration is higher inside many cells than it is outside these cells. Could this be accomplished by passive diffusion? Explain your answer.
There must be some major drawbacks t the widespread use of non-embryonic stem cells. What are those draw backs?
We are supposed to draw a lineweaver burke plot to calculate the Km and Vmax, which I am able to do, except the units for the substrate are supposed to be micromolar.
A second-order reaction of the type A+2B -> P was caried out in a solution that was initally 0.075mol L^-1 in A and 0.030 mol L^-1 in B. Afer 1.0 h the concentration of A had fallen to 0.045 mol L^-1.
What would be the most appropriate microscopy tool for visualizing the 3D surface of a damaged bone? For viewing a thin slice of tissue stained with hemotoxylin and eosin?
Explain two ways in which a change in a DNA molecule could lead to the emergence of a constitutive mutant. How could these two types of constitutive mutants be distinguished genetically.
A researcher has come up with 5 hypotheses - based on what you know about the key milestones of life which do you think is most likely to be true?
Enzymes are typically required to catalyze reactions that would be very unlikely to occur on their own. Suppose that the activation energy, Ea, for the uncatalyzed cheese reaction at 20C is 18kcal/mol.
What would be the fate of an erythrocyte (red blood cell) placed into a 15% sucrose solution? Explain what happens and your reasoning.
Estimate the major entryway of carbon into the food chain and what is major process that "fixes" carbon into biomass?
Virtually all sulfur-reducing members of Enterbacteriaceae are motile. Suppose for a moment that you inoculate a SIM medium with an inole-producing sulfur reducer that is non motile. After completing all aspects of the test, what would you expect ..
What would DNA footprinting reveal about the DNA binding sites of a normal Lac repressor protein? A normal RNA polymerase.
Do you think that a prenatal test is worthwhile if it detects a genotype, but cannot predict the phenotype? Discuss the risk/benefit issues of this situation.
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