SBI4U Biology Practice Test PDF

TVO ILC SBI4U Practice Test Biology SBI4U Practice Test Time: 2 hours Total Marks: 95 In...

TVO ILC SBI4U Practice Test Biology SBI4U Practice Test Time: 2 hours Total Marks: 95 Instructions There is a label attached to this page. Compare the course code on the label with the course code printed on the Final Test to make sure that they are the same. Tell the Final Test supervisor immediately i f they are not the same. You may use a non-marked dictionary during the Final Test if one is available at the test site. You may not use any other books or notes. You will need a pen and calculator. A periodic table of the elements and a table of codons for amino acids are included at the beginning, to assist you with the chemistry questions. You must write your answers in the space provided. This test has five parts. A breakdown of the marks and the approximate time needed for each part is given below. Look over the entire test before you begin. Manage your time carefully and leave some time at the end to review your work. Part Activity Marks Time (minutes) Preview 5 A Population Dynamics 15 22 B Biochemistry 20 22 C Metabolic Processes 19 22 D Molecular Genetics 20 22 E Homeostasis 21 22 5 Total 95 120 At the end of the test, return this test paper and all of your work (including drafts) to the Final Test supervisor. Please note that, for security reasons, marked tests are not returned to students. Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. No part of these materials may be reproduced, in whole or in part, in any form or by any means, electronic or mechanical, including photocopying, recording, or stored in an information or retrieval system, without the prior written permission of The Ontario Educational Communications Authority. Every reasonable care has been taken to trace and acknowledge ownership of copyright material. The Independent Learning Centre welcomes information that might rectify any errors or omissions. TVO ILC SBI4U Practice Test Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. iii TVO ILC SBI4U Practice Test Conversions and Formula Sheet Table: The codons that code for each amino acid First Second letter Third letter U C A G letter Phenylalanine Serine Tyrosine Cysteine U Phenylalanine Serine Tyrosine Cysteine C U Leucine Serine STOP STOP A Leucine Serine STOP Tryptophan G Leucine Proline Histidine Arginine U Leucine Proline Histidine Arginine C C Leucine Proline Glutamine Arginine A Leucine Proline Glutamine Arginine G Isoleucine Threonine Asparagine Serine U Isoleucine Threonine Asparagine Serine C A Isoleucine Threonine Lysine Arginine A START /Methionine Threonine Lysine Arginine G Valine Alanine Aspartate Glycine U Valine Alanine Aspartate Glycine C G Valine Alanine Glutamate Glycine A Valine Alanine Glutamate Glycine G Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 1 TVO ILC SBI4U Practice Test Part A: Population Dynamics (15 marks) (approximate time: 22 minutes) 1. a) In two sentences, explain two key events influencing the population growth of humans on earth over the last 4000 years. (2 marks) b) Explain a societal factor that is a major contributor to the recent decline in birth rates in developed countries. (1 mark) 2. Calculate the ecological density of a population of 350 white-tailed deer that were confined to a 530 km 2 valley containing a lake measuring 80 km 2 in area. Show your full solution. (3 marks) 3. About 20 years ago, a herd of 10 female and 3 male white-tailed deer were introduced to Farlane Island, which is 100 km from the nearest land mass. There were no indigenous deer or any predators on the island. A scientist visited the island every year and gathered population data on the deer herd. The data is shown below in graphical form. White-tailed deer population on Farlane Island 700 600 500 400 300 200 100 0 0 5 10 15 20 Time (years) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 2 TVO ILC SBI4U Practice Test a) What type of population growth does the graph reveal, overall? (1 mark) b) Identify the three phases common to this pattern of growth by drawing two vertical lines on the above graph to indicate where the phases are changing, and then label each phase. (3 marks) c) Write out the mathematical equation of the model that explains the pattern of growth of the population. (1 mark) d) From years 1 to 10, the deer population increases. Explain how this happens. (1 mark) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 3 TVO ILC SBI4U Practice Test e) How would the graph change if a competitor were introduced in year 17? (2 marks) f) Draw your hypothesized new trend line, beginning at year 16, on the same graph you used for part (b) above. (1 mark) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 4 TVO ILC SBI4U Practice Test Part B: Biochemistry (20 marks) (approximate time: 22 minutes) 4. For each of the following, state the type of biochemical reaction involved (redox, condensation, hydrolysis, and neutralization) (7 marks). a) Glucose + fructose → sucrose + water _____________________________ b) Pyruvate + 2H+ + 2 electrons → lactate _____________________________ c) HCl + NaOH → NaCl + H2O _____________________________ d) Fe → Fe2+ + 2 electrons _____________________________ e) NaOH + HBr → H2O + NaBr _____________________________ f) Many glucoses → glycogen + water _____________________________ g) Protein + water → many amino acids + water ____________________________ 5. What is a covalent bond? (1 mark) 6. Compare the process of exocytosis to the process of endocytosis. (3 marks) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 5 TVO ILC SBI4U Practice Test 7. Mary roasted a turkey. Before she placed the turkey in the oven, she rubbed the turkey with a mixture of salt and sage. She cooked it by following the package’s instructions exactly, but when she tasted the turkey a few hours later, she noticed that it was dry. Since her turkey did not overcook, what did Mary do wrong? Use biology terminology when you explain your answer. (2 marks) 8. Complete the following reaction by drawing the molecular structure of the main product. Label the reactants and product. Circle and label an example of the hydroxyl functional group and the carboxyl functional group in the reactants. Circle and label the main type of linkage present in the product. (5 marks) O H H H H H H C C C C C C C H H HO H H H H H H H C OH O H H H H H H H C OH C C C C C C C H H C OH HO H H H H H H H O H H H H H H C C C C C C C H HO H H H H H H 9. How does an enzyme “lower the activation energy” of a reaction? (2 marks) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 6 TVO ILC SBI4U Practice Test Part C: Metabolic Processes (19 marks) (approximate time: 20 minutes) 10. Cellular respiration transforms chemical energy that is stored in foods that we eat into a form of energy called ATP. a) How does the structure of ATP enable its function? (2 marks) b) What is the relationship between ATP and ADP? (2 marks) 11. a) Write the chemical equation for photosynthesis. (2 marks) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 7 TVO ILC SBI4U Practice Test b) What is the chemical equation for aerobic cellular respiration? (2 marks) c) What evidence of anaerobic cellular respiration would you expect to find if yeast were placed in a closed container, containing warm sugar water? (1 mark) 12. Complete the table. (5 marks) Type of reaction Light-depentant reactions Light-indepentant reactions Location in chloroplast Purpose Converts light energy to chemical energy stored in ATP and NADPH Products 13. What does the “dark” reaction (light-independent reaction) of photosynthesis receive from the “light” reaction (light-dependent reaction)? (1 mark) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 8 TVO ILC SBI4U Practice Test 14. Complete the diagram that follows by labelling any four of the processes or components that correspond to the blanks labelled (a) to (g). (4 marks) a) b) c) d) e) f) g) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 9 TVO ILC SBI4U Practice Test Part D: Molecular Genetics (20 marks) (approximate time: 22 minutes) 15. Write the DNA strand that is complementary to the following. (2 marks) 5' ATTGCATTGGGGTA 3' 16. Describe the Watson and Crick model of DNA structure. (3 marks) 17. Fill in the missing information, in the following table. (5 marks) Enzyme Function Prevents helix from super-coiling DNA helicase It is the enzyme responsible for “stringing” nucleotides together to make the newly synthesized DNA. It catalyzes the formation of phosphodiester bonds between adjacent deoxyribonucleoside triphosphates. Glues together Okazaki fragments RNA primase Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 10 TVO ILC SBI4U Practice Test 18. For this question, you will need to use the table for the genetic codes provided on the Conversions and Formula Sheet of this test. Given the following sequence of DNA codons, complete the table by filling in the corresponding mRNA codons and the amino acid that would result from their translation and transcription. (4 marks: ½ mark each) DNA codon (5-3) TAC CAG GTA GAC mRNA codon Amino acid 19. A DNA codon, GAC, is mutated so that there is a substitution of the second nucleotide, replacing the A with a G. What would be the corresponding a) i) mRNA codon? (1 mark) ii) amino acid? (1 mark) b) What type of mutation would result? (1 mark) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 11 TVO ILC SBI4U Practice Test 20. Match each of the following six biotechnology terms from the first column with its corresponding best meaning from the second column. Write the correct alphabetical letter in the blank space provided below the table, for each answer. Note: Each meaning can only be used once. (3 marks: ½ mark for each term) Biotechnology term Meaning 1. DNA ladder a) Makes many copies of target DNA 2. Restriction endonuclease b) Enzyme used to attach nucleotides to DNA strand 3. DNA amplification c) Used to separate DNA by segment strand length 4. DNA barcoding d) Used to visualize DNA in agarose gels under UV light 5. Gel electrophoresis e) Used to identify the species from a sample of tissue 6. Fluorescently labelled ddNTPs f) Used to cut DNA at specific base pair sites along the sequence g) Used to leave markers of known nucleotide length along a gel h) Used to identify the last nucleotide in a short strand of DNA Write alphabetical letter of answer: 1. _____________ 4. _____________ 2. _____________ 5. _____________ 3. _____________ 6. _____________ Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 12 TVO ILC SBI4U Practice Test Part E: Homeostasis (21 marks) (approximate time: 20 minutes) 21. Describe the three steps of urine formation. Include a description of the molecules involved during each step, and state whether active or passive transport (or both) is required. (6 marks) Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 13 TVO ILC SBI4U Practice Test 22. Define the following hormones. Include the gland that releases them, the target gland, and one example of an action that the hormone triggers in the body. (6 marks: 1 mark for each completed box) Hormone Gland Target Action Estrogen Cortisol Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 14 TVO ILC SBI4U Practice Test 23. Explain the process of repolarization in a nerve. (4 marks) 24. (5 marks) Example Community interaction term 1. Certain species of ants eat aphids that land on the a) Realized niche plant under which the ants are living. 2. Some species of worms obtain their food by living in b) Interspecific competition the intestines of other animals and eating the digesting material before it can be absorbed by the host animal. 3. Remora fish attach themselves to whales or sharks to c) Fundamental niche catch a free ride and obtain opportunistic meals, while causing no harm to their host. 4. Certain species of ants protect aphids from d) Intraspecific competition predation by ladybugs. In turn, the ants obtain a meal of sugary “honeydew” released by the aphids. 5. Two species of parrot both eat the same types of fruit. e) Predation f) Mutualism g) Commensalism h) Parasitism Write alphabetical letter of answer: 1. 2. 3. 4. 5. Copyright © 2020 The Ontario Educational Communications Authority. All rights reserved. 15