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a) A human nerve cell with an average surface area of 250,000micrometers squared has an extracellular potassium ion concentration of 3mM and an intracellular potassium concentration of 90mM. An impulse causes the potassium channels to open and the ions start to flow out of the cell. At what rate do the ions flow out of the cell if P=0.03cm/s?
b) Now the recovered nerve cell (intracellular potassium concentration of 90mM) is placed into 80mM potassium solution and excited for a second time. What is the rate of diffusion here? By what factor does it change when comparing to sceniaro a (the first one above)?
Having learned an optimum sugar concentration, students next decide to investigate whether different strands of yeast ferment glucose to produce different amounts of alcohol. In brief explain how this experiment would be set up.
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Prior to protein synthesis, the DNA: attracts tRNAs with appropriate amino acids. adheres to ribosomes for protein synthesis.
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Explain the etiology and genetics of disease phenylketonuria (PKU) Phenylketonuria (PKU) refers to a disease found within humans in which the affected individual does not have enzyme phenylalanine hydroxylase.
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