Biology 12. Examination Booklet 2009/10 Released Exam January 2010 Form A DO NOT OPEN ANY EXAMINATION MATERIALS UNTIL INSTRUCTED TO DO SO.

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1 Biology 12 Examination Booklet 2009/10 Released Exam January 2010 Form A DO NOT OPEN ANY EAMINATION MATERIALS UNTIL INSTRUCTED TO DO SO. FOR FURTHER INSTRUCTIONS REFER TO THE RESPONSE BOOKLET. Contents: 32 pages Examination: 2 hours 67 multiple-choice questions in the Examination Booklet Additional Time Permitted: 60 minutes Province of British Columbia

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3 PART A: MULTIPLE CHOICE Value: 67 marks Suggested Time: 80 minutes INSTRUCTIONS: For each question select the best answer and record your choice on the Answer Sheet provided. Using an HB pencil, completely fill in the bubble on the Answer Sheet that has the letter corresponding to your answer. You have Examination Booklet Form A. In the box above #1 on your Answer Sheet, fill in the bubble as follows. Exam Booklet Form/ Cahier d examen A B C D E F G H 1. Hydrogen bonds form between A. oxygen atoms. B. hydrogen atoms. C. water molecules. D. glucose molecules. 2. Which of the following illustrates a polysaccharide? A. H C OH CH 2 OH C H OH C O H C H C OH B. H O R H O R N H C C N H C C C N C C N C H H R H O R H O H OH C. CH 3 OH D. O O O O O O O O O O O CH 3 O Biology Form A Page 1

4 3. Which of the following is a lipid? A. lipase B. glycerol C. glycogen D. testosterone Use the following diagram to answer question 4. W Y Z 4. A component of the structures labelled is produced at A. V. B. W. C. Y. D. Z. V Page 2 Biology Form A

5 Use the following table to answer question 5. DNA base analysis Base Guanine Y Z % of base in sample 22% 28% 22% 28% 5. Which of the following correctly identifies DNA bases, Y and Z? Y Z A. adenine cytosine uracil B. adenine cytosine thymine C. cytosine uracil adenine D. thymine adenine cytosine 6. DNA from different species is joined during A. translation. B. replication. C. transcription. D. recombination. 7. Which of the following occurs during complementary base pairing? A. Bonds form between uracil and thymine. B. Bonds form between cytosine and guanine. C. Bonds break between phosphates and sugars. D. Bonds break between amino acids and phosphates. Biology Form A Page 3

6 8. Which of the following is produced as a result of replication? A. DNA B. protein C. mrna D. ribosomes Use the following diagram to answer question 9. + Y Z 9. In which of the following are both helicase and DNA polymerase active? A. only B. Y only C. Z only D. and Z 10. When cells are in a hypotonic solution, the concentration of solute in the cells is A. lower than that of the solution. B. higher than that of the solution. C. the same as that of the solution. Page 4 Biology Form A

7 11. Which of the following correctly compares a large cell to a smaller cell? Surface-area-to-volume ratio (compared to a smaller cell) Efficiency in removing wastes (compared to a smaller cell) A. greater more B. greater less C. smaller more D. smaller less Use the following diagram of the cell membrane to answer question 12. W { Y Z 12. Which structure is the fluid component of the fluid-mosaic model? A. W B. C. Y D. Z Biology Form A Page 5

8 Use the following diagram of the cell membrane for question The structure labelled is A. polar and hydrophilic. B. polar and hydrophobic. C. non-polar and hydrophilic. D. non-polar and hydrophobic. 14. When red blood cells are placed in an isotonic salt solution, they A. swell. B. crenate. C. lose mass. D. remain the same size. Page 6 Biology Form A

9 Use the following diagram of a cellular process to answer question Which of the following is produced as a result of this process? A. ATP B. ADP C. oxygen D. glucose 3 Use the following graph of an enzyme-catalyzed reaction to answer question 16. Rate of Reaction 0 Time Y 16. Which of the following could account for the shape of the graph between time and time Y? A. A co-enzyme was added at time. B. All of the enzymes have been denatured. C. There is a limited amount of enzyme available. D. The substrate has been completely broken down. Biology Form A Page 7

10 17. Heavy metal ions cause the rate of an enzyme-catalyzed reaction to decrease by A. decreasing the activation energy. B. altering the shape of the active site. C. increasing the substrate concentration. D. preventing the substrate from binding with co-enzymes. 18. Which of the following increases the total amount of product formed in an enzyme-catalyzed reaction? A. maintaining optimum ph B. increasing the activation energy C. increasing the amount of substrate D. increasing the temperature from 20 C to 37 C Use the following graph to answer question 19. Time T W Rate of reaction Z Y 0 Time 19. What graph illustrates the rate of an enzyme-catalyzed reaction occuring in the stomach if the ph is decreased from ph 6 to ph 2 at Time T? A. W B. C. Y D. Z Page 8 Biology Form A

11 Use the following diagram of an enzyme-catalyzed reaction to answer questions 20 and 21. Z Y W 20. What is structure Y? A. a product B. a reactant C. an active site D. an enzyme-substrate complex 21. Competitive inhibitors bind to which structure? A. W B. C. Y D. Z Biology Form A Page 9

12 22. In which structure are vitamins synthesized by bacteria? A. B. C. D. Page 10 Biology Form A

13 Use the following diagram of the digestive system to answer question 23. W Y Z 23. The contents of which structure have the highest concentration of hydrogen ions? A. W B. C. Y D. Z 24. Decreased secretion of insulin results in A. increased production of glycogen in the liver. B. increased concentration of glucose in the blood. C. decreased concentration of protein in the small intestine. D. decreased concentration of sugar molecules in the duodenum. Biology Form A Page 11

14 Use the following molecular diagram to answer question 25. H H H H H H H H H H H O H C C C C C C C C C C C C H H H H H H H OH 25. Which of the following catalyzes the reaction that produces this molecule? A. bile B. lipase C. amylase D. peptidase Use the following diagram illustrating a section of a blood vessel to answer question The vessel shown above is A. a vein. B. a venule. C. an artery. D. a capillary. 27. Which of the following engulf foreign substances in the blood? A. platelets B. antibodies C. red blood cells D. white blood cells Page 12 Biology Form A

15 28. Which vessel transports blood between the liver and the posterior vena cava? A. renal artery B. hepatic vein C. mesenteric vein D. hepatic portal vein Use the following diagram of the heart to answer question 29. Y 29. The function of structures and Y is to A. control the heart rate. B. prevent the backflow of blood. C. prevent the semilunar valves from inverting. D. delay the impulse from the AV node until the atria have contracted. Biology Form A Page 13

16 Use the following diagram of a blood vessel to answer question A function of this type of blood vessel is to carry blood from the A. liver to the heart. B. heart to the lungs. C. fetus to the placenta. D. aorta to the intestines. Use the following diagram of the circulatory system to answer question indicates a capillary bed in which structure? A. the eye B. the arm C. the lung D. the kidney Page 14 Biology Form A

17 Use the following graph to answer question 32. Magnitude Blood velocity Blood pressure Total cross-sectional area W Y Z Distance from the left ventricle 32. Which area of the graph displays the conditions in the iliac artery? A. W B. C. Y D. Z 33. Excess tissue fluid is reabsorbed by the A. subclavian veins. B. lymph capillaries. C. hepatic portal vein. D. posterior vena cava. 34. Which of the following occurs at the arterial end of a capillary bed in a muscle? A. Plasma proteins enter the tissues. B. Blood pressure forces fluid to enter the tissues. C. Carbon dioxide and glucose enter the bloodstream. D. Osmotic pressure causes water to move into the blood. Biology Form A Page 15

18 Use the following cross section of the heart to answer question After blood is forced in the direction shown by the arrows, what is the next event in the cardiac cycle? A. closing of the semilunar valves B. generation of a nerve impulse by the sinoatrial (SA) node C. generation of a nerve impulse by the atrioventricular (AV) node D. opening of the atrioventricular (AV) valves by the chordae tendineae 36. Which of the following moves mucus in the respiratory system? A. cilia B. alveoli C. pharynx D. diaphragm 37. During inhalation, air moves from the nose directly into the A. alveoli. B. bronchi. C. pharynx. D. bronchioles. Page 16 Biology Form A

19 Use the following diagram to answer question Blood moving away from this structure has a high concentration of A. oxyhemoglobin. B. bicarbonate ions. C. reduced hemoglobin. D. carbaminohemoglobin. 39. Which of the following is not produced as a result of external respiration? A. water B. carbon dioxide C. oxyhemoglobin D. bicarbonate ions 40. If the pleural membranes are punctured, A. the alveoli expand. B. the epiglottis closes. C. a lung may collapse. D. pressure decreases in the thoracic cavity. Biology Form A Page 17

20 Use the following diagram of the respiratory system to answer question 41. Z Y W 41. Which structure responds to nervous stimulation from the medulla oblongata? A. W B. C. Y D. Z Page 18 Biology Form A

21 Use the following diagram to answer question 42. In Y Z Out W 42. Where is the concentration of reduced hemoglobin the greatest? A. W B. C. Y D. Z 43. Which structure is located completely within the central nervous system? A. the thalamus B. a motor neuron C. a sensory neuron D. a sensory receptor Biology Form A Page 19

22 Use the following diagram to answer question indicates A. cell bodies. B. synaptic clefts. C. Schwann cells. D. sensory neurons. Page 20 Biology Form A

23 Use the following diagram of the brain to answer questions 45 and 46. W Y Z V 45. What structure is responsible for skeletal muscle coordination? A. V B. C. Y D. Z 46. Secretions produced by structure W cause which of the following to be released? A. insulin B. follicle-stimulating hormone (FSH) C. human chorionic gonadotropin (HCG) D. gonadotropin-releasing hormone (GnRH) Biology Form A Page 21

24 Use the following diagram of a reflex arc to answer question What structures are included in? A. a motor neuron and receptors B. a motor neuron and an effector C. receptors and a sensory neuron D. an interneuron and a sensory neuron 48. What is an effect of the secretion of epinephrine (adrenaline)? A. decreased breathing rate B. slowing of the heartbeat C. slower rate of peristalsis D. constriction of the pupils Page 22 Biology Form A

25 Use the following diagram to answer question What occurs at when the threshold level has been reached? A. Acetylcholine is released. B. Neurotransmitters are absorbed. C. The membrane becomes permeable to sodium ions. D. The membrane becomes permeable to calcium ions. Use the following graph of an action potential to answer question Membrane potential (millivolts) 0 65 Y Time (milliseconds) 50. Which of the following occurs in the neuron between times and Y? A. The concentration of sodium ions in the cytoplasm increases. B. The concentration of potassium ions in the cytoplasm increases. C. The concentration of sodium ions surrounding the axon increases. D. The concentration of potassium ions surrounding the axon increases. Biology Form A Page 23

26 Use the following graph of an action potential to answer question Membrane potential (millivolts) 0 65 V W Y Time (milliseconds) Z 51. When does repolarization occur? A. between V and W B. between W and C. between and Y D. between Y and Z Page 24 Biology Form A

27 Use the following diagram to answer question 52. W Y Z 52. What structure secretes a hormone that initiates the fight or flight response? A. W B. C. Y D. Z 53. What structure carries both urine and semen? A. the ureter B. the urethra C. the vas deferens D. the collecting duct Biology Form A Page 25

28 Use the following diagram to answer question 54. Z Y W 54. Which letter indicates the renal medulla? A. W B. C. Y D. Z Y Use the following diagram to answer question 55. Z W 55. What part of the nephron is most affected by hypertension? A. W B. C. Y D. Z Page 26 Biology Form A

29 Use the following diagram of the brain to answer question Which part of the nephron is affected by a hormone synthesized at? A. the glomerulus B. the loop of Henle C. the collecting duct D. the proximal convoluted tubule 57. Aldosterone increases blood pressure by causing A. the excretion of potassium ions. B. increased reabsorption of sodium ions. C. the excretion of water at the distal convoluted tubule. D. increased permeability of the collecting duct to water. 58. What structure adds secretions to seminal fluid? A. the urethra B. the prostate C. the epididymis D. the vas deferens Biology Form A Page 27

30 Use the following diagram of a cross section of a testicle to answer question 59. Y W Z 59. Where do sperm become mature? A. W B. C. Y D. Z Use the following diagram of the male reproductive system to answer question 60. W Y Z 60. Secretions from what structure cause the onset of beard growth and other characteristics of puberty? A. W B. C. Y D. Z Page 28 Biology Form A

31 Use the following diagram of the female reproductive system to answer question 61. W Y Z 61. Which letter indicates the oviduct? A. W B. C. Y D. Z 62. Which of the following produces a hormone that results in breast development? A. the uterus B. the ovaries C. the adrenal cortex D. the posterior pituitary 63. Which of the following correctly matches a gland with its secretion? Gland Secretion A. ovaries GnRH B. testes luteinizing hormone C. Cowper s gland testosterone D. anterior pituitary follicle-stimulating hormone Biology Form A Page 29

32 64. What results from a decrease in the secretion of gonadotropic-releasing hormone (GnRH)? A. The uterine glands will produce less mucus. B. The endometrium becomes glandular and secretory. C. The follicle will secrete follicle-stimulating hormone (FSH). D. The corpus luteum decreases human chorionic gonadotropin (HCG) secretion. Use the following graph of the hormones of the menstrual cycle to answer question 65. Relative levels of hormones Day 65. Line represents the concentration of which hormone in the blood? A. progesterone B. luteinizing hormone (LH) C. follicle-stimulating hormone (FSH) D. human chorionic gonadotropin (HCG) Page 30 Biology Form A

33 Use the following diagram of hormone levels during pregnancy to answer question 66. Increasing hormone concentration 66. The function of the hormone labelled is to Months of pregnancy A. maintain the corpus luteum. B. cause the secretion of oxytocin. C. cause maturation of a new follicle. D. increase the level of follicle-stimulating hormone (FSH). Biology Form A Page 31

34 Use the following diagram of the female reproductive system to answer question 67. Z Y W 67. The stimulation of which structure results in the release of oxytocin during labour? A. W B. C. Y D. Z You have Examination Booklet Form A. In the box above #1 on your Answer Sheet, ensure you filled in the bubble as follows. Exam Booklet Form/ Cahier d examen A B C D E F G H This is the end of the multiple-choice section. Answer the written-response questions in the Response Booklet. Page 32 Biology Form A

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37 MINISTRY USE ONLY MINISTRY USE ONLY Question NR Question NR Place Personal Education Number (PEN) here. Question NR Question 4 Course Code = BI 2009/10 Released Exam January 2010 Exam Booklet Form/, Cahier d examen A B C 12 D E F G H Question Question NR NR NR Student Instructions 1. Place your Personal Education Number (PEN) label at the top of this Booklet AND fill in the bubble (Form A, B, C, D, E, F, G or H) that corresponds to the letter on your Examination Booklet. 2. Use a pencil to fill in bubbles when answering questions on your Answer Sheet. 3. Use a blue- or black-ink pen when answering written-response questions in this Booklet. 4. Read the Examination Rules on the back of this Booklet Version

38 MINISTRY USE ONLY Place Personal Education Number (PEN) here. Course Code = BI 12 Biology /10 Released Exam January 2010 Response Booklet Province of British Columbia

39 PART B: WRITTEN RESPONSE Value: 23 marks Suggested Time: 40 minutes INSTRUCTIONS: 1. Answer the following questions in the space provided in this Response Booklet. 2. Use a pen for this part of the examination unless otherwise instructed. 3. You may not need all of the space provided to answer each question. Use the following diagram to answer question 1. Organelle 1 Organelle 2 1. Identify organelles 1 and 2 and compare their functions in at least two ways. (4 marks) Biology Response Booklet Page 1

40 2. Explain how the structure of water molecules allow this substance to be an effective temperature regulator. Give an example of this regulation in the human body. (3 marks) Page 2 Biology Response Booklet

41 3. Describe the process of translation. (4 marks) Biology Response Booklet Page 3

42 4. Explain how the liver, gall bladder and pancreas work together during digestion. (5 marks) Page 4 Biology Response Booklet

43 5. Explain how the nervous system lowers blood pressure after a fight or flight response. (3 marks) Biology Response Booklet Page 5

44 6. Explain how the consumption of alcohol and the resulting decrease in the secretion of anti-diuretic hormone (ADH) affects both blood pressure and thirst. (4 marks) Page 6 Biology Response Booklet

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47 Examination Rules 1. The time allotted for this examination is two hours. You may, however, take up to 60 minutes of additional time to finish. 2. Answers entered in the Examination Booklet will not be marked. 3. Cheating on an examination will result in a mark of zero. The Ministry of Education considers cheating to have occurred if students break any of the following rules: Students must not be in possession of or have used any secure examination materials prior to the examination session. Students must not communicate with other students during the examination. Students must not give or receive assistance of any kind in answering an examination question during an examination, including allowing their paper to be viewed by others or copying answers from another student s paper. Students must not possess any book, paper or item that might assist in writing an examination, including a dictionary or piece of electronic equipment, that is not specifically authorized for the examination by ministry policy. Students must not copy, plagiarize or present as their own, work done by any other person. Students must immediately follow the invigilator s order to stop writing at the end of the examination time and must not alter an Examination Booklet, Response Booklet or Answer Sheet after the invigilator has asked students to hand in examination papers. Students must not remove any piece of the examination materials from the examination room, including work pages. 4. The use of inappropriate language or content may result in a mark of zero being awarded. 5. Upon completion of the examination, return all examination materials to the supervising invigilator.