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1-In normal cells an RTK receptor that binds to epidermal growth factor is present. When EGF is present in the extracellular space it binds to the receptor and initiates an RTK signal transduction cascade that ultimately tells the cell to undergo mitosis. Describe what would happen to cell division if a cell begins to express both the natural EGF receptor and a mutated version that is capable of binding to EGF. While both receptors can bind to EGF the mutated version cannot initiate receptor dimerization and autophosphorylation.
2-Why is it beneficial for a cell signaling pathway to be coupled to a MAP kinase cascade which essentially activates a number of MAP kinase proteins via phosphorylation?
Rough-winged swallows will adopt the offspring of other swallows when parents are experimentally given these nestlings, just as lesser kestrels do when nesting on roof tops. This kind of similarity has a label; what is it and why might these two s..
Tracey had been slightly concerned about trace glucose that was found in Max's urine 6-hours after his exercise until she found that he had eaten an entire large pizza an hour before the urinalysis.
Describe the steps that occur between the time that a nerve impulse is transmitted across a neuromuscular junction to the time that the muscle fiber actually begins to shorten. What is the role of calcium ions in this process?
A line of mouse cells is growing for many generations in a medium with 15N. cells in G1 are then switched to a new medium that contains 14N.
Assuming the PAV allele is the original one, what types of mutations (silent, missense, nonsense, etc.) have changed the PAV allele into the AVI allele? Explain. Based on the information given, how do these changes fit with what you have learned a..
Where might you find vine plants? Why do epiphytes and succulents share similar stem structures, and is there some similarity in the conditions under which the two plants grow? are there other groups of plants that exhibit secondary growth other t..
Reiterate this process of progressively adding the cards over a 15-minute period. Specify if you are able to detect an increasingly dim light longer you spent in dark?
Calculate the number of alpha-helical turns present in the same DNA molecule given above, given that the average molecular weight of a complementary pair of nucleotides is 618 grams per mole,and there are 10 nucleotide pairs per turn of the double..
Can viruses evolve? Why or why not? a. No, only their hosts can evolve. b. Yes, their genetic make-up responds to natural selection. c. No, they are not alive. d. Yes, they are able to alter their genetic code directly in response to selection pre..
A geneticist crosses a plant with blue flowers to a plant with white flowers. The offspring include plants with dark blue flowers (1/4), light blue flowers (1/2),
Do you think biochemical testing must be recommended to detect the deleterious gene in Mrs. Lehman. Which one increased their alveolar ventilation, or do they stay the same? Why with appropriate reason.
Write an equation for ethyl acetate from ehyl alcohol, acetic acid, and concentrated sulfuric acid to illustrate the formation of the ester.
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