Biol110-10-Problem Set#2A

Biol110-10-Problem Set#2A - amphiphilic chemical features...

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Student number__________ Grader number___________ Biol110-Cell Biology Fall 2010 Problem Set #2 Question #1: Phospholipids and Membrane Structure What is the average geometry (shape) of the phospholipid molecules that make-up biological membranes and why is this particular geometry important? (5 pts) Draw a small cross-section of a biological membrane displaying the topology of the lipids in the membrane (a sticks and balls drawing; no chemical bonds please!), and clearly mark the
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Unformatted text preview: amphiphilic chemical features of the phospholipid molecules. (5 pts) What forces keep phospholipids together, and why is it important that the interactions be non-covalent? (5 pts) Describe the dynamics of phospholipid movement in a membrane, and explain why it is so difficult for them to flip-flop between leaflets on their own. (5 pts) What are two important functions of cholesterol in human cell membranes? (5 pt)...
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