The Cell Membrane: Gatekeeper of the Cell
Explore the structure and function of the cell membrane, including its components and roles in cellular transport, for Grade 9 Science.
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The Cell Membrane: Gatekeeper of the Cell
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Read each question carefully and answer to the best of your ability. Refer to your knowledge of the cell membrane.
1. What is the primary function of the cell membrane?
Protein synthesis
Controlling what enters and leaves the cell
Storing genetic material
Producing energy
2. Which of the following is a key component of the cell membrane?
Cell wall
Mitochondria
Phospholipid bilayer
Nucleus
3. The cell membrane is described as a model because its components can move freely within the membrane.
4. Small, uncharged molecules like oxygen and carbon dioxide can pass through the cell membrane through the process of .
5. The cell membrane is impermeable to all substances.
True
False
6. Integral proteins are embedded within the lipid bilayer of the cell membrane.
True
False
7. Briefly explain the fluid mosaic model of the cell membrane.
8. Label the following components on the diagram of the cell membrane below:
a) Phospholipid bilayer
b) Integral protein
c) Peripheral protein
d) Glycoprotein
e) Cholesterol
