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Exam I - Spring 2007 - Exam I Spring 2007 Phospholipids a...

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Exam I – Spring 2007 Phospholipids: a) consist of a polar, hydrophilic, phosphate-bearing head and two non-polar, hydrophobic, fatty acid tails. b) are aligned in a lipid bilayer c) serve as a carrier molecule d) both [a] and [b] are correct e) all of the above are correct Question 2 Which of the following statements concerning the plasma membrane is correct? Question 3 Which of the following is not a function of membrane proteins? Question 4 If a cell were exposed to a hypertonic solution which of the following would occur? Question 5 Selective permeability of the membrane is primarily determined by: a) membrane phospholipids b) how much cholesterol is present c) the number and type of membrane proteins d) the charge of the membrane e) all of these answers Question 6 Carrier-mediated transport: Question 7
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Which increases the rate of diffusion for a substance through a membrane? Question 8 Which of the following descriptions of movement of molecules across the plasma membrane is correct?
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