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What feature of iPS cells removes all the ethical reservations that accompany work with ES cells and makes it much easier to generate iPS cells in the lab? What difficulties must be overcome before iPS cells can be used as a source of cells for human therapy? How might the problem of immune rejection of iPS cell replacements eventually be avoided?
If a transferrin receptor has a cross-sectional area of 50 Angstroms X 100 angstroms (5x10nm), and how many receptors could be accomodated in a 100nm clathrin-coated vesicle assume that only 50% of surface area can be occupied by proteins.
Hypothesize how recombination might adversely affect the functioning of an operon such as the lac operon or the trp operon. What might be the metabolic implications for an E. coli cell that experiences a disruption of one of these operons?
Considering the pathology of a cytokine storm, select possible strategies that would be likely to diminish the harmful effects of superantigen toxins.
Biotechnology allows us to employ living organisms or their processes for human needs or purposes. Research how biotechnology is used today. Discuss one use of biotechnology, answering the following questions:
Hydrolases are one important class of enzyme that function to catalyze.
Consider a cold winter day with air temperature of 5C and relative humidity of about 20% (moisture content 0.001g H2O/g dry air). A person waiting at a bus stop inhales at an average rate of 7g dry air/min and exhales air .
A DNA sequence produces a mutant protein in which several amino acids in the middle of the protein differ from the normal protein. What kind of mutation could have occurred?
Platinum color in foxes is produced by a heterozygous genotype involving interactions between a gene for silver and a co-dominant lethal gene. The silver gene in the homozygous state produces silver color; the lethal homozygote usually dies during..
A new Nurse intern has been working non-stop for 15 hrs in the ER. A patient was showing serious signs of dehydration. The Nurse took action without checking with the attending physician and administered 1 liter of sterile distilled water intravenous..
Organisms like jellyfish, sponges and flatworms do not have a circulatory system or lungs. What adaptations do these organisms have for oxygen delivery?
What is an appropriate discussion topic that reinforces the lab topic, Taxonomy.
Think about the following three mice: a gray male, a gray female, and a tan female. When the male mated with the gray female, all the offspring were gray.
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