Phospholipids and Cell Membrane Functions

What is the primary function of the cell membrane?

• To store genetic information.

• To generate ATP for cellular processes.

• To control the movement of substances into and out of the cell.

• To provide rigid structural support to the cell.

Which part of a phospholipid molecule is attracted to water?

• The fatty acid tails.

• The phosphate head.

• The cholesterol molecules.

• The protein channels.

How are phospholipids arranged in the cell membrane's bilayer structure?

• The hydrophilic heads face inward, away from water.

• The hydrophobic tails face the watery environments outside and inside the cell.

• The hydrophobic tails face each other in the interior of the membrane.

• They are randomly scattered without a specific orientation.

What is the main function of cholesterol within the cell membrane?

• To act as a channel for large, charged molecules.

• To provide cell identification markers.

• To stabilize the membrane and help regulate what passes through it.

• To initiate cell division.

Explain in your own words how a cell membrane is like a strainer.