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Electro-physiologists can measure the electrical potential (=voltage) across a cell membrane using micro-electrodes. Recalling that this potential is due to an uneven distribution of charged ions across a membrane, consider the following case: When you expose the cells of the electric organ of the electric eel to the signaling molecule acetylcholine, the electrical potential across these cells membranes rapidly becomes more positive. Give a plausible explanation for this observation, focusing on the type of signal receptor that might be involved.
Briefly discuss the scientific and ethical considerations behind the cloning of whole organisms, especially humans.
Discuss transmetallation with examples and What is reactivity-selectivity principle? Please explain with examples
What might be the importance of the vinyl either linkage at C-1 of glycerol in ethanolamine plasmalogen.
The science of ecology has roots in many disciplines. Describe how nineteenth century naturalist influenced the development of ecology.
The movement of glucose into a cell against a concentration gradient is most likely to be accomplished by which of the subsequent. movement of glucose into the cell through a glucose channel.
A sample has between 3.3 x 10^-4 and 3.3 x 10^-8 CFU/mL. Devise a complete but efficient (that is, no extra plates!) dilution scheme that will ensure getting a countable plate.
ten percent (0.100) of the men in a population in Hardy-Weinberg proportions are color-blind because of an X-linked recessive allele. What proportion of the women in this population do you expect to be color-blind?
Radish flowers may be red, purple or white. A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The part of the radish we eat may be oval or long, with long being the dominant characteristic.
Why do we need DNA polymerase I and not just DNA polymerase III, if polymerase I is just initiating DNA replication and polymerase III does all the "heavy lifting" and continues it, why don't we just use polymerase III? Wouldn't that be more effic..
Discuss the factors that will influence the size of the zone of inhibition of an antibiotic when employing the Kirby-Bauer method
What events mark the beginning and the end of the second stage of interphase? What happens in the cell during this stage?
A substitution mutation occurs in the GRE making it unrecongnizable to the glucocorticoid receptor. Determine what impact would this have on transcription of gene downstream of this element?
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