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2

This is a classic Fermi estimation problem. The usual approach is to estimate the volume of a body, estimate the volume of a cell, and divide one by the other, remembering of course to have both volumes in the same units. My quick attempt gave 1013 to the nearest order of magnitude.


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I realize this question is about yeast, but I'm afraid that people may try to expand the answer to all systems, and beta galactosidase is not good for all systems, particularly for animal studies. I've seen too many gene therapy papers try to get away with using it. Beta galactosidase is not a good reporter gene for in vivo gene delivery studies. There is ...


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Find, or calculate, a value for the volume of the sperm head. Find a value for the size of the human genome (haploid or diploid?) Convert the genome size, which will probably in Giga basepairs, into mass (I suggest picograms). Divide mass by volume to get a density, pg μm-3 Refinement - does the sperm nucleus take up all of the head volume? Do you ...


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I don't think any of the answers here are quite right, so I'll give a try: (A) The resting membrane potential of -70 mV would not change with either GABA or glutamate treatments. The answer here is: "It depends". For glutamate, if the neuron only had NMDA receptors that were not "open" at -70 mV, there would be no change in resting membrane potential. ...


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Its true that T-test are used when your dependent variable is Numeric and Chi-Square test is used when you are analysis categrical variable. But how about this: You have a categorical response (0,1) to a campaign. 1 who bought the product and 0 who did not. If you sum up the responses in your Test group and Control group and devide them by thier respective ...


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It will depend on how quickly the salinity is raised and to what level. Two studies (Karraker 2007, Karraker et al. 2008) looked at the effects of road salt (used to reduce icing on roads in winter) in the spotted salamander, the wood frog (a small frog), and the green frog (a big frog). Their studies showed that survival decreased, especially for larval ...


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Salt draws water out of cells via the process of osmosis. Essentially, water moves across a cell membrane to try to equalize the salinity or concentration of salt on both sides of the membrane. If you add enough salt, too much water will be removed from a cell for it to stay alive or reproduce. Organisms that decay food and cause disease are killed by a high ...


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Another factor involved is the effect that high salt concentrations have on the 3-D structure of proteins. At higher than "normal" concentrations of salt, many proteins will fold differently and no longer be in their "active" form. Since all biological reactions involve enzymes, which are protein, you can see why this unfolding might be problematic.



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