| 1. | Which of the following molecules can both diffuse through a cell membrane | |
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A. | Amino acids and starch |
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B. | Amino acids and water |
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C. | Starch and protein |
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D. | Protein and water |
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| 2. | Plants store starch instead of glucose because | |
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A. | glucose is a large molecule |
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B. | starch is too small |
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C. | starch will not diffuse out of a cell |
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D. | glucose will not diffuse out of a cell |
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| 3. | A concentration gradient exists between two solutions of | |
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A. | equal concentrations of the same substance |
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B. | equal concentrations of different substances |
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C. | different concentrations of the same substance |
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D. | different concentrations of the different substances |
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| 4. | In diffusion substances move from | |
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A. | a high concentration to a lower concentration |
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B. | a high concentration to a high concentration |
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C. | a low concentration to a low concentration |
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D. | a low concentration to a higher concentration |
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| 5. | The diagram shows the concentrations of blue moleclues in four cells. In which direction will the blue molecules move?
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A. | from cell A to cell B | |
B. | from cell B to cell D | ||
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C. | from cell D to cell A | |
D. | from cell C to cell A | ||
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| 6. | Carbon dioxde, oxygen and dissolved food are important substance in the body. Which of these enter or leave the cell by diffusion? | |
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A. | carbon dioxide only |
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B. | carbon dioxide and dissolved food only |
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C. | oxygen, carbon dioxide and dissolved food |
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D. | oxygen and dissolved food only |
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| 7. | Diffusion is important to mammals. One reason is that | |
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A. | they breathe by diffusion |
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B. | oxygen enters their blood by diffusion |
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C. | blood moves by diffusion |
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D. | carbon dioxide enters their cells by diffusion |
The diagram below shows a model cell that was set up to investigate diffusion through a selectively permeable membrane. Iodine is a small, soluble molecule.
| 8. | Predict the colour change which would be observed after one hour.
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Colour Change after one hour |
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Starch Suspension |
Iodine Solution |
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A. | remained cloudy white | yellow to blue black |
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B. | cloudy white to blue/ black | remained yellow |
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C. | remained cloudy white | remained yellow |
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D. | cloudy white to blue/ black | yellow to blue black |
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| 9. | Which line in the table below identifies correctly the importance of diffusion to an animal cell?
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Raw material Gained |
Waste Product Removed |
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A. | oxygen | glucose | ||||||||||
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B. | carbon dioxide | oxygen | ||||||||||
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C. | oxygen | carbon dioxide | ||||||||||
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D. | glucose | oxygen | ||||||||||
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| 10. | The cell membrane is made | |||||
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A. | entirely of lipids | ||||
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B. | up of proteins | ||||
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C. | of carbohydrates and proteins | ||||
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D. | of proteins and lipids | ||||
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| 11. | The diagram shows a section of a cell membrane that includes a channel protein. The function of this protein is to —
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A. | strengthen the outer boundary of the cell | |
B. | connect reproductive cells during fertilization | ||
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C. | allow certain substances to enter or leave the cell | |
D. | exchange organelles or chromosomes between specialized cells | ||
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| 12. | Which set of materials would be best to use to prepare a wet mount slide of onion skin cells? | ||||||
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A. |
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B. |
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C. |
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D. |
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| 13. | In a typical animal cell, which component would contain the greatest amount of water? | |
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A. | Cell membrane |
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B. | Cytoplasm |
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C. | Ribosomes |
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D. | Nucleus |
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| 14. | Under a microscope, a series of cells are observed and they don’t contain a nucleus. Which of these is the most likely cell type? | |
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A. | Plant cell |
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B. | Animal cell |
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C. | Bacteria |
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D. | Fungus |
Use the diagram below to answer questions 15 and 16.
The diagram shows the movement of molecules into and out of a cell.
| 15. | Which letter shows the diffusion of a material into a cell?
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A. | A | |
B. | B | |
C. | C | |
D. | D | |
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| 16. | Which arrow shows the diffusion of a molecule out of the cell?
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A. | A | |
B. | B | |
C. | C | |
D. | D | |
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| 17. | Which of the following is required for diffusion to occur? | |
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A. | cell membrane |
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B. | energy |
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C. | water |
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D. | a concentration gradient |
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| 18. | Cells from a fungus differ from those of a plant cell because they | |
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A. | don’t contain cytoplasm |
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B. | don’t have a cell wall |
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C. | don’t contain chloroplasts |
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D. | don’t have ribosomes |
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| 19. | Plant cells, fungal cells and bacteria have which feature in common | |
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A. | chloroplast |
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B. | cytoplasm |
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C. | vacuole |
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D. | ribsosomes |
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| 20. | Bacteria differ from all other types of cell beacuse | |
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A. | their genetic information is not contained in a nucleus |
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B. | they have a cell wall |
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C. | they don’t have a cell wall |
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D. | they have ribosomes |
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| 21. | Which line in the table below identifies correctly the direction of diffusion of the three substances during muscle contraction?
Substance |
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Glucose |
Oxygen |
Carbon Dioxide |
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A. | out | out | in | ||||||||
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B. | in | out | in | ||||||||
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C. | out | in | out | ||||||||
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D. | in | in | out | ||||||||
