Transport Across Membranes · CSEC Biology

39 past-paper questions on Transport Across Membranes, part of Life Processes and Disease, from every CSEC Biology paper on Quelpr.

1. 1(a)4 marks· Biology Q1 1(a)List the apparatus and materials and describe the method of this investigation.
2. 1(b)4 marks· Biology Q1 1(b)Construct a table to represent the data shown in Figure 1.
3. 1(c)(i)2 marks· Biology Q1 1(c)(i)Explain the results obtained when the potato strips were placed in pure water.
4. 1(c)(ii)4 marks· Biology Q1 1(c)(ii)Explain the results obtained when the potato strips were placed in sugar solution less than 1.0 M and greater than 1.0 M.
5. 1(c)(iii)1 mark· Biology Q1 1(c)(iii)Name the process responsible for the results obtained in this experiment.
6. 1(c)(iv)1 mark· Biology Q1 1(c)(iv)Suggest ONE possible source of error in this experiment.
7. 1(d)(i)3 marks· Biology Q1 1(d)(i)Explain why the appearance of an animal cell would be different from that of a plant cell after immersion in pure water for 30 minutes.
8. 1(d)(ii)3 marks· Biology Q1 1(d)(ii)Explain why the appearance of an animal cell would be different from that of a plant cell after immersion in concentrated sugar solution for 30 minutes.
9. 1(e)4 marks· Biology Q1 1(e)Describe the physical processes involved in the movement of water from the soil into the plant roots, up the stem and out through the leaves.
10. 1(e)1 mark· Biology Q1 1(e)Name another process by which substances can move in and out of cells.
11. 1(f)2 marks· Biology Q1 1(f)Give TWO reasons why living organisms need to move substances in and out of their cells.
12. 2(b)4 marks· Biology Q2 2(b)Tissues made up of Type B cells are placed in a container of concentrated salt solution and left for one hour. Describe THREE changes in the appearance of the cells after one hour in the concentrated salt solution, and…
13. 2(b)(i)1 mark· Biology Q2 2(b)(i)Name the process by which gases move in the directions shown by the arrows.
14. 2(b)(i)4 marks· Biology Q2 2(b)(i)State the expected observation if EACH of the cell types (plant cell and animal cell) was placed in distilled water for 15 minutes. Suggest ONE reason for EACH observation.
15. 2(b)(i)1 mark· Biology Q2 2(b)(i)Name the process that causes the change in the appearance of both cells.
16. 2(b)(ii)2 marks· Biology Q2 2(b)(ii)Explain why the process named in (b)(i) above is important to plant cells.
17. 2(b)(ii)1 mark· Biology Q2 2(b)(ii)Name the process which is responsible for the observation in (b)(i).
18. 2(b)(iii)1 mark· Biology Q2 2(b)(iii)The plant cell becomes turgid after one hour. Suggest why cell turgidity is useful to the plant.
19. 2(b)(iv)4 marks· Biology Q2 2(b)(iv)Why does the animal cell burst but the plant cell does not?
20. 2(c)4 marks· Biology Q2 2(c)Tissues made up of Type A cells and Type B cells are placed in a container of distilled water and left for one hour. Describe how the appearance of Type A cells is expected to differ from that of Type B cells and give…
21. 2(c)(i)2 marks· Biology Q2 2(c)(i)Explain what happens to an animal cell when it is removed from the organism and placed into concentrated sucrose solution.
22. 2(c)(ii)2 marks· Biology Q2 2(c)(ii)Explain what happens to an animal cell when it is removed from the organism and placed into distilled water.
23. 2(c)(iii)2 marks· Biology Q2 2(c)(iii)Describe how the results would be different from (c)(i) and (ii) for a plant cell in concentrated sucrose solution and distilled water respectively. Concentrated sucrose solution
24. 2(c)(iii)2 marks· Biology Q2 2(c)(iii)Describe how the results would be different from (c)(i) and (ii) for a plant cell in concentrated sucrose solution and distilled water respectively. Distilled water
25. 3(b)6 marks· Biology Q3 3(b)The cell in Figure 3 was left in a concentrated salt solution for one hour. In the space below, draw an annotated diagram to show the appearance of this plant cell after one hour.
26. 3(b)6 marks· Biology Q3 3(b)In the space below, draw an annotated diagram to show the appearance of the guard cells after the plant is watered in the early morning. Use an arrow to show the movement of the water in the cell.
27. 3(c)2 marks· Biology Q3 3(c)Explain why the behaviour of an animal cell would differ from that of a plant guard cell when they are placed in dilute solutions.
28. 4(b)(i)3 marks· Biology Q4 4(b)(i)Explain the effect this would most likely have on EACH cell.
29. 4(b)(ii)2 marks· Biology Q4 4(b)(ii)Explain how the process responsible for the results in (b) (i) differs from the process by which gases move in and out of leaf cells.
30. 4(c)(i)4 marks· Biology Q4 4(c)(i)What is likely to occur in Cells 1 and 2 of Figure 4 if they were placed in distilled water for over half-an-hour?
31. 4(c)(ii)2 marks· Biology Q4 4(c)(ii)Explain why the changes in Cell 1 might be different from the changes in Cell 2 after half-an-hour in distilled water.
32. 4(d)2 marks· Biology Q4 4(d)Although blood cells are in a watery medium (plasma) they do not absorb excessive amounts of water. Explain why this is so.
33. 4(e)2 marks· Biology Q4 4(e)The concentration of sugars in the cell sap has been calculated to be 10%. Describe what will happen to the cell if it is placed in a 50% sugar solution.
34. 3(b)(i)1 mark· CSEC Biology · January 2021 · Paper 2Define the term 'diffusion'.
35. 3(b)(ii)1 mark· CSEC Biology · January 2021 · Paper 2Define the term 'osmosis'.
36. 3(b)(iii)1 mark· CSEC Biology · January 2021 · Paper 2Define the term 'active transport'.
37. 3(c)(i)1 mark· CSEC Biology · January 2021 · Paper 2State the expected result of the experiment investigating the effect of concentration on diffusion shown in Figure 4.
38. 3(c)(ii)3 marks· CSEC Biology · January 2021 · Paper 2Explain the expected results stated in your answer in (c)(i).
39. 3(d)4 marks· CSEC Biology · January 2021 · Paper 2Discuss FOUR ways in which diffusion is important to mammals.