The Cell Membrane: Structure and Function

The Cell Membrane: Structure and Function

Read each question carefully and provide thoughtful answers. Refer to your knowledge of cell biology and the cell membrane. Diagrams may be helpful for some questions.

1. Label the following components of the cell membrane in the diagram below:

a) Phospholipid bilayer

b) Integral protein

c) Peripheral protein

d) Glycoprotein

e) Glycolipid

f) Cholesterol

2. The cell membrane is described by the   model, which suggests that its components are constantly moving.

3. The primary component of the cell membrane is the  , which forms a barrier to most water-soluble molecules.

4.   are embedded within the lipid bilayer, while   are found on the surface of the membrane.

5. In animal cells,   helps maintain membrane fluidity across a range of temperatures.

6. Which of the following is NOT a primary function of the cell membrane?

7. Which type of membrane protein is involved in transporting specific substances across the membrane?

8. Diffusion is a form of active transport that requires energy.

9. Facilitated diffusion requires transport proteins but does not require ATP.

10. Osmosis is the movement of solutes across a selectively permeable membrane.

11. Explain the difference between passive transport and active transport across the cell membrane. Provide an example of each.

12. Describe the role of glycoproteins and glycolipids in cell-to-cell recognition.