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Cell Membranes

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The Lipid Bilayer

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Membrane Proteins

Problems

Problem : Identify the lipid bilayer in the following diagram of a cell.

Cell

Solution for Problem 1 >>

Problem : What is the main function of the lipid bilayer?

Solution for Problem 2 >>

Problem : Why is the structure called a lipid bilayer?

Solution for Problem 3 >>

Problem : Fill in the blanks.
A phospholipid molecule contains two distinct regions. The __________ region is attracted to water and the ___________ region is repelled from water. As a result of its both polar and nonpolar regions, it is classified as a(n) __________ molecule.

Solution for Problem 4 >>

Problem : Are the two layers of the lipid bilayer identical in composition?

Solution for Problem 5 >>

< Previous Section
The Lipid Bilayer

Next Section >
Membrane Proteins