Membrane practice problems.pdf - Biol 361 Practice Problems...

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Biol 361 Practice Problems: Membranes 1 1. Consider a frog living in a Vancouver pond. What are two differences you might expect to see in the composition of the cell membranes of this frog on a cool day in April (13 ° C) and on a warm day in August (30 ° C)? Clearly explain why you would expect to see each of these differences. 2. Consider two cells, X and Y. Both are epithelial cells, located in different regions of the same human body, but X has a faster rate of sucrose transport than Y. Suggest two possible reasons for this difference. Clearly explain why each difference could make sucrose transport faster in X than in Y. 3. You are studying flight muscle cells in bees, and have just discovered a new cell membrane protein in these cells. You think that this protein is involved in transporting fructose into these cells, but you are not sure what type of transport protein it is. What are two ways that you could distinguish between a pump (for primary active transport) and a permease? [Just for fun extra problem: Design a simple experiment that would allow you to clearly distinguish between these two options.
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