Grade 9 Biology: Cell Membrane Function
This worksheet covers the structure and function of the cell membrane, including transport mechanisms and its role in maintaining homeostasis.
Includes
Standards
Topics
Grade 9 Biology: Cell Membrane Function
Name:
Date:
Score:
Read each question carefully and answer to the best of your ability. Use complete sentences for short answer questions.
1. Which of the following best describes the primary function of the cell membrane?
Storage of genetic material
Production of energy
Regulating passage of substances into and out of the cell
Synthesizing proteins
2. The cell membrane is primarily composed of a bilayer of which macromolecules?
Carbohydrates
Nucleic acids
Lipids and proteins
Amino acids
3. The movement of water across a selectively permeable membrane from an area of high water concentration to an area of low water concentration is called .
4. transport requires energy to move substances against their concentration gradient.
5. The model describes the cell membrane as a mosaic of components that are able to move fluidly within the membrane.
6. Referring to the diagram of the cell membrane above, explain the role of the phospholipid bilayer in regulating the passage of substances.
7. Differentiate between passive transport and active transport, providing an example of each.
8. Facilitated diffusion requires energy from the cell to move molecules across the membrane.
True
False
9. The cell membrane is completely impermeable to all large molecules.
True
False
Match each term on the left with its correct definition on the right.
10. Hypotonic Solution
a. Solution with a higher solute concentration than the cell's cytoplasm
11. Hypertonic Solution
b. The movement of substances from an area of high concentration to low concentration
12. Isotonic Solution
c. Solution with a lower solute concentration than the cell's cytoplasm
13. Diffusion
d. Solution with the same solute concentration as the cell's cytoplasm