ProblemSetC - Problem Set C Lectures 7, 8 and 9 (Ch. 7 and...

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Problem Set C Lectures 7, 8 and 9 (Ch. 7 and 8) 1. Membrane Fluidity a. You are a graduate student doing research of cell membranes at UCSD. When decreasing the temperature of cells 1 and 2, you notice that the plasma membrane of cell 1 solidifies at a significantly lower temperature than cell 2. Explain the main reason for this observation in 1-2 sentences. b. Cholesterol is sometimes thought of as a “temperature buffer” for plasma membranes. Thus, at high temperatures, cholesterol (increases / decreases) membrane fluidity and at low temperatures, cholesterol (increases / decreases) membrane fluidity. c. ___________ movement of phospholipids occurs about 10 7 times/second. d. Phospholipids _____________ across the plasma membrane about 1 time/month. 2. Endomembrane System Correctly order the path of a secretory protein from synthesis to secretion. (Answers may be used more that once) I. Plasma Membrane II. Trans-Golgi III. ER lumen IV. Cis-Golgi V. Vesicle 3. Transport a. Complete the chart. Transport
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ProblemSetC - Problem Set C Lectures 7, 8 and 9 (Ch. 7 and...

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