Membrane Function Worksheet
Grade 12 Biology worksheet exploring the structure and function of cell membranes, including transport mechanisms and membrane fluidity.
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Membrane Function: Grade 12 Biology
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Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. Which component of the cell membrane is primarily responsible for its selective permeability?
Proteins
Carbohydrates
Phospholipid bilayer
Cholesterol
2. Which type of transport requires energy to move substances across the cell membrane against their concentration gradient?
Facilitated diffusion
Osmosis
Simple diffusion
Active transport
3. The fluid mosaic model describes the cell membrane as a mosaic of and that are able to move fluidly within the bilayer.
4. is the movement of water across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.
5. Describe the primary function of the cell membrane and explain how its structure contributes to this function.
6. Differentiate between passive and active transport mechanisms, providing an example of each.
7. Label the following diagram of a cell membrane:
8. Cholesterol increases the fluidity of the cell membrane at low temperatures and decreases it at high temperatures.
True
False
9. Endocytosis and exocytosis are forms of bulk transport that require energy.
True
False
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