Biology /08 Released Exam August 2008 Form A Provincial Examination Answer Key

Transcription

1 Biology /08 Released Exam August 2008 Form A Provincial Examination Answer Key Cognitive Processes K = Knowledge U = Understanding = igher Mental Processes Weightings 22% 58% 20% Types 67 = Multiple Choice (MC) 6 = Written Response (WR) Topics 1. Cell Biology 2. Processes of Science and Cell Biology 3. uman Biology Prescribed Learning Outcomes (PLOs) B1 B6 A2; B7 11 C1 C15 Weightings 18% 18% 64% Number Keyed Response Cognitive Process Mark Topic PLO Type 1. D U 1 1 B1 MC 2. C U 1 1 B1 MC 3. A U 1 1 B1 MC 4. B U 1 1 B1 MC 5. C 1 1 B3 MC 6. C K 1 1 B4 MC 7. C K 1 1 B4 MC 8. A 1 1 B4 MC 9. D U 1 1 B4 MC 10. B U 1 1 B5 MC 11. D U 1 1 B5 MC Biology Form A Key Page 1

2 Number Keyed Response Cognitive Process Mark Topic PLO Type 12. B U 1 2 B7 MC 13. B U 1 2 B7 MC 14. B K 1 2 B8 MC 15. C 1 2 B9 MC 16. B K 1 2 B9 MC 17. D U 1 2 B11 MC 18. C U 1 2 B11 MC 19. C K 1 2 B11 MC 20. C U 1 2 B11 MC 21. A U 1 2 B11 MC 22. C 1 2 B11 MC 23. B U 1 2 B11 MC Biology Form A Key Page 2

3 Number Keyed Response Cognitive Process Mark Topic PLO Type 24. C U 1 3 C1 MC 25. B U 1 3 C1 MC 26. D 1 3 C1 MC 27. B K 1 3 C1 MC 28. B U 1 3 C1 MC 29. A K 1 3 C1 MC 30. D 1 3 C1 MC 31. B U 1 3 C1 MC 32. D K 1 3 C1 MC 33. A U 1 3 C5 MC 34. D U 1 3 C5 MC 35. B 1 3 C5 MC 36. D U 1 3 C5 MC 37. D U 1 3 C5 MC 38. C K 1 3 C5 MC 39. D K 1 3 C6 MC 40. B U 1 3 C6 MC 41. D K 1 3 C6 MC 42. A K 1 3 C10 MC 43. C K 1 3 C8 MC 44. A U 1 3 C9 MC 45. A U 1 3 C10 MC 46. B U 1 3 C10 MC 47. B U 1 3 C10 MC 48. A U 1 3 C10 MC Biology Form A Key Page 3

4 Number Keyed Response Cognitive Process Mark Topic PLO Type 49. A U 1 3 C11 MC 50. D K 1 3 C11 MC 51. A U 1 3 C11 MC 52. B U 1 3 C11 MC 53. D U 1 3 C12 MC 54. A U 1 3 C12 MC 55. A U 1 3 C12 MC 56. C U 1 3 C12 MC 57. D K 1 3 C13 MC 58. A U 1 3 C13 MC 59. B K 1 3 C13 MC 60. C 1 3 C13 MC 61. B 1 3 C13 MC 62. D K 1 3 C14 MC 63. C K 1 3 C14 MC 64 A U 1 3 C14 MC 65. D 1 3 C14 MC 66. C 1 3 C14 MC 67. B 1 3 C15 MC Biology Form A Key Page 4

5 Number Keyed Response Cognitive Process Mark Topic PLO Type 1. U 4 2 B4 WR 2. U 4 2 B9 WR C5 WR C11 WR 5. U 4 3 C13 WR 6. U 4 3 C15 WR Biology Form A Key Page 5

6 Biology /08 Released Exam August 2008 Provincial Examination Scoring Guide Use the following diagram to answer question 1. R-group of serine C 1. (4 marks) Serine is an amino acid with a unique R-group. Draw a diagram of this amino acid in the box below, incorporating the R-group shown above into your drawing. Label the amino end and the acid (carboxyl) end. O Amino end N C C C O O Acid end O (2 marks for correct chemical diagram) (1 mark for correct labeling of amino end) (1 mark for correct labeling of acid end) Biology Scoring Guide Page 1

7 2. (4 marks) Describe four functions of proteins in the cell membrane. Channel proteins allow molecules to pass through the membrane freely. Carrier proteins allow specific molecules to pass through the membrane freely (1 mark) or actively (1 mark). Cell recognition proteins with attached carbohydrates identify cells to the immune system. Receptor proteins pass chemical signals across the cell membrane. Enzymatic proteins allow reactions to occur at the membrane. any four for 1 mark each Biology Scoring Guide Page 2

8 3. (4 marks) Compare the chemical composition of the blood in the umbilical artery with the blood in the umbilical vein. One mark will be given for each valid comparison. Compared to the umbilical vein, blood in the umbilical artery has higher concentrations of: carbon dioxide hydrogen ions bicarbonate ions reduced hemoglobin carbaminohemoglobin urea. Compared to the umbilical artery, blood in the umbilical vein has higher concentrations of: oxyhemoglobin glucose amino acids nucleotides. any four comparisons for 1 mark each Biology Scoring Guide Page 3

9 Use the following diagram to answer question (3 marks) Describe how a nerve impulse travels between these two structures. Calcium ions flow into the synaptic ending, causing the contractile proteins to contract. As they contract, they pull the vesicles to the surface of the presynaptic membrane. They merge with the membrane and release neurotransmitters into the cleft. The neurotransmitters diffuse across the cleft and fit into receptor sites on the postsynaptic membrane. By fitting into receptor sites, an action potential is generated in the postsynaptic membrane. The neurotransmitters are either destroyed by enzymes or reabsorbed. any three for 1 mark each Biology Scoring Guide Page 4

10 5. (4 marks) Describe how the body detects and responds to dehydration in order to maintain proper blood fluid volume. Dehydration results in an increased solute concentration in the blood (1 mark) which is sensed by osmoreceptors in the hypothalamus. (1 mark) The osmoreceptors signal the posterior pituitary gland to increase antidiuretic hormone (AD) secretion. (1 mark) Increased AD stimulates the kidney to increase the reabsorption of water (1 mark), decreasing the solute concentration in the blood. (1 mark) The osmoreceptors stimulate thirst, causing the person to increase water intake, thereby decreasing solute concentration in the blood. (1 mark) Biology Scoring Guide Page 5

11 Use the following graph to answer question 6. Y Ovarian hormone levels in blood plasma X Days of the ovarian cycle 6. (4 marks) Explain how the levels of ovarian hormones shown at X and Y affect the pituitary gland and the endometrium. X: Increasing levels of estrogen cause increased secretion of luteinizing hormone (L) from the pituitary. either one Increasing levels of estrogen cause decreased secretion of for 1 mark follicle-stimulating hormone (FS) from the pituitary. Increasing levels of estrogen cause an increase in the thickness of the endometrium. (1 mark) AND Y: igh levels of progesterone cause a decrease in the secretion of L from the pituitary. (1 mark) igh levels of progesterone from the ovary cause the endometrium to increase in thickness, become vascularized and to produce mucus. (1 mark) Biology Scoring Guide Page 6