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Assume you and your lab partner have made the following artificial membranes: Membrane 1: made entirely of phosphatidylcholine with saturated 16-carbon fatty acids Membrane 2: same as one, except a single cis double bond Membrane 3: same as one but only 14 carbon atoms After determining the transition temperatures of the membranes, your lab partner did not record which temperature was assigned to which membrane. The three values are -36degC, 23degC, and 41degC. Assign each of the transition temperatures to the correct artifical membrane and explain your reasoning.
Provide your opinion as to why the progress of gene therapy has been disappointingly slow. Give several specific examples of actual failures in gene therapy trials.
What factors might account for differences among taxa in their numbers of extant species? Suggest methods for determining which factor might actually account for an observed difference.
In Drosophila, the map directions of genes are given in map units numbering from one end of a chromosome to the other. The X chromosome of Drosophila is 66 m.u. long.
Throughout exposure to elevated glucose, a yeast cell's membrane glucose transporters will rapidly increase so the cell can import glucose. Which will represent the yeast cell response.
How might the choosing of the more prevalent codon
Is this an instance of a positive or negative feedback mechanisms? What is the initial stimulus? What is the result.
Assume you had supply of nucleotides made with atoms that were twice as heavy as normal, and you permitted some cells to replicate their dna once, using only heavy nucleotides.
Before this module evaluation you were very nervous. Consider a snack might help, you ate a big bowl of pasta and some bread a couple of hourse before you started this quiz.
How would you answer to a person who argued that there is nothing to worry about because natural systems, through natural succession, will heal the wounds of human activities and restore the balance of nature.
The given dipeptide is Asp-Tyr. Recognize the charge state for each structure at the given pH by adding the + or - charges to the appropriate functional groups and adding or removing hydrogen atoms to the structure where appropriate.
Colchicine causes disassembly of microtubules. What result (if any) may you see on a giant algal cell in which cytoplasmic streaming is occurring.
Assume you infected an E. coli culture with a virulent bacteriophage. Most of the cells lysed, but a few survived - 1x10^-4. You wonder where the resistant bacteria came from.
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