Cell Membrane Structure and Transport

Question 1

Phospholipid Bilayer:
Explain the amphipathic structure of the phospholipid bilayer

Answer 1

The hydrophobic tails face out
The hydrophilic headgroups phase in

Question 2

Explain the Fluid Mosaic Model

Answer 2

The cell membrane is a mosaic if lipid, protein, and carbohydrate molecules
Molecules can move within the cell membrane, making it fluid.

Question 3

How do the Fatty Acyl Tails Affect the Fludity of the Cell Membrane?

Answer 3

Short fatty acyl tails are less likely to interact with each other, making the membrane more fluid.

Double bonds form kinks in the fatty acyl tails. This makes it harder for the tails to interact with each other, making the membrane more fluid.

Question 4

How Does Cholesterol Affect the Cell Membrane at Different Temperatures

Answer 4

At high temperatures it stabilizes the membrane and prevents it from falling apart.

At low tem