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Movement of chloride ions across the cell membrane from the the outside of nerve cells to the inside has a delta-G of about 1.1 kcal/mol even in the presence of a gradient. Why is the gradient alone not enough to get the ions into the cell? (Think about how delta-G […]

You scoop up a water sample from a local pond nearby, because you are curious about the possible microbes that might live there.  After looking at several slides that held drops of the sample, you noticed two different kinds of cells:  One kind was very small and had no separate […]

In an experiment you, the researcher, remove ATP from the system. What would be a likely consequence of the lack of ATP on muscle contraction? The tropomyosin filament would not be dislodged preventing contraction.The cross bridges would remain linked and therefore contraction would stopThe cross bridges would break apart due […]

A group of Chinese men immigrated to America and settled among a group of Native Americans. Over the years, each of the Russian men took one wife from among the Native-American women. The original group of Chinese included 32 men with the Rh-negative blood type (coded for by the genotype […]