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june key - XX0 WRITTEN RESPONSE SCORING GUIDE BIOLOGY 12...

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956bipk - 1 - April 20, 1996 XX0 WRITTEN RESPONSE SCORING GUIDE BIOLOGY 12 PROVINCIAL EXAMINATION JUNE 1995 Province of British Columbia Ministry of Education
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956bipk - 2 - April 20, 1996 JUNE 1995 BIOLOGY 12 PROVINCIAL EXAMINATION KEY AND SCORING GUIDE PART B: WRITTEN-RESPONSE (28 marks) INSTRUCTIONS: 1. Use a pen for this part of the examination. 2. Write your answers in the space below the questions. 3. Organization and planning space has been incorporated into the space allowed for answering each question. 4. You may not need all of the space provided to answer each question. 1. Living animal cells are added to a solution containing oxygen, carbon dioxide, amino acids and glucose. After four hours, the solution surrounding the cells is sampled and the concentration of each substance is measured. a) Predict the change in the concentrations of carbon dioxide and glucose in the solution surrounding the cells. (2 marks: 1 mark each) Carbon Dioxide Increase 1 mark Glucose Decrease 1 mark b) Using your knowledge of membrane structure, explain the mechanisms that account for these changes in carbon dioxide and glucose concentration. (4 marks: 2 marks each) Carbon Dioxide Diffusion 1 mark CO 2 dissolves in water to move through a protein pore 1 mark Glucose Facilitated Transport 1 mark or • Active Transport 1 mark - Glucose is carried by a protein carrier through the membrane 1 mark - Glucose is moved by a protein carrier using ATP 1 mark
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956bipk - 3 - April 20, 1996 2. Complete the following table using you knowledge of biological molecules. (4 marks: 1 2 mark each box) BIOLOGICAL MOLECULE UNIT MOLECULE (Building Block) EXAMPLE OF BIOLOGICAL MOLECULE nucleic acid nucleotide DNA, RNA protein amino acids enzyme polysaccharide simple sugar glycogen neutral fat fatty acid and glycerol butter 3. Summarize anaerobic respiration with respect to the following: (3 marks: 1 mark each) a) Net number of ATP produced per glucose. • 2 ATP 1 mark b) Name a product in addition to ATP. • lactic acid CO 2 • alcohol any one for 1 mark c) Location of reaction(s) in the cell. • in the cytoplasm • outside of the mitochondria any one for 1 mark
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956bipk - 4 - April 20, 1996 4. Describe white and red blood cells with respect to the following. (4 marks) White blood cells i) Site of production: Bone marrow 1 mark ii) Brief description of shape: Amoeboid/Irregular 1 mark Red blood cells iii) Brief description of shape: Biconcave 1 mark iv) Function: Transports oxygen and carbon dioxide 1 mark
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956bipk - 5 - April 20, 1996 Use the following diagram to answer question 5. X W Y Z 5. Identify and state one function of each part of the brain labelled W, X, Y and Z. (6 marks:
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june key - XX0 WRITTEN RESPONSE SCORING GUIDE BIOLOGY 12...

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