Cell Membranes

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

Cell

Solution for Problem 1 >>

Solution

The lipid bilayer is the outer-most layer surrounding the cell.

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

Problem : Why is the structure called a lipid bilayer?

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.

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