Mock Exam. Biology, Grade 11, University Preparation (SBI3U) Duration 3 hours. Non-Programmable calculator allowed

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1 Mock Exam Biology, Grade 11, University Preparation (SBI3U) Duration 3 hours Non-Programmable calculator allowed Answer all questions on the question paper Use blank side of the sheets for rough work, if needed. Name: Date : Section Your score Total Marks Knowledge 25 Communication 25 Application 25 Problem solving 25 Total 100 Good Luck!

2 2 Knowledge For the questions below, please circle the correct answer. 1. The phloem is vascular tissue that (a) consists of dead tubular cells (b) transport sugar from the leaves to all parts of the plant (c) is present only in the stems (d) transports water from the roots to the leaves (e) has no specific function 2. Cells in the apical meristem that cause a root to grow longer are found (a) just behind the root cap (b) along the side of the root (c) in the center of the root (d) at the top of the root where it joins the stem (e) in the stem itself 3. Which of the following statements comparing fibrous and taproot systems is incorrect? (a) fibrous root systems are common in grasses. (b) Dandelions have taproots. (c) Taproots store food more efficiently that fibrous roots. (d) Plants with taproots prevent erosion more efficiently than plants with fibrous roots (e) Taproots are able to reach deep into the soil for water. 4. Energy (a) is created by plants (b) can be transformed but not destroyed (c) is a fundamental component of atoms (d) in the form of heat, is the basis of the food chain (e) will run out soon 5. The cytoskeleton allows that following process(es) to proceed: (a) protein synthesis (b) mitosis (c) active transport (d) digestion inside the cell (e) all of the above 6. glycolysis describes the process of (a) making proteins on ribosomes (b) breaking glycogen into glucose (c) making glycogen in the liver (d) red blood cells bursting as a result of osmosis (e) breaking glucose into pyruvate 7. Mendel's law of dominance states that (a) in an organism heterozygous for a trait, only one of the two alleles is expressed (b) two alleles that determine a characteristic will separate when sex cells form (c) an allele that is expressed is recessive (d) the inheritance of a particular allele is not affected by the inheritance of other alleles. 8. Due to the similar behavior of genes and chromosomes, we can conclude that (a) genes and chromosomes perform similar functions (b) chromosomes pairs separate during meiosis

3 3 (c) genes linked on the same chromosomes are sometimes separated (d) genes are located on chromosomes 9. Which of the following mutations adds one or more base pairs to a DNA molecule? (a) nonsense mutations (b) frameshift mutations (c) inversions (d) silent mutations 10. Gas exchange in plants takes place (a) across the membranes of cells in the main roots of the plants (b) across the membranes of the root hairs (c) in individual cells (d) in stomata (e) in phloem cells 11. The true statement among the following is (a) Type O blood can only be given to Type AB individuals. (b) Type O blood does not contain any antibodies. (c) Type AB blood contains A and B antigens on the surface of the cells. (d) Type AB blood is called the universal donor. (e) Type A blood cannot receive Type O blood. 12. The release of food from the stomach to the small intestine is controlled by the (a) villus (b) larynx (c) epiglottis (d) uvula (e) pyloric sphincter 13. Conifers (a) have small, inconspicuous flowers (b) produce spores (c) are examples of bryophytes (d) are examples of gymnosperms (e) have co-evolved with specialized pollinators such as insects 14. Molluscs (a) are acoelomates (b) have a coelom that originates from a split in the mesoderm later (c) have a coelom that forms from pouches in the embryonic gut (d) are all characterized by a large external shell (e) include segmented worms 15. Identify the type of cell shown below: (a) plant cell (b) fungal cell (c) animal cell (d) prokaryotic cell (e) protist cell

4 4 16. If the sequence of bases in one strand of DNA is AATCGG, what is the sequence of the complementary strand? (a) TTGCAA (b) TTAGCC (c) UUAGCC (d) TTUGCC (e) None of the above 17. Cardiopulmonary circulation does not involve (a) the pulmonary veins (b) the right ventricle (c) the left atrium (d) the carotid artery (e) the pulmonary arteries 18. Diatoms (a) have rigid cell walls with an outer layer of silicia (b) have two flagellae (c) are mainly fresh-water organisms (d) area prokaryotes (e) increase in size at each generation 19. Jellyfish are in the phylum (a) Porifera (b) Cnidaria (c) Platyhhelminthes (d) Gnetophyta (e) Cephalochordata 20. Cells in the apical meristem that cause a root to grow longer are found (a) just behind the root cap (b) along the side of the root (c) in the center of the root (d) at the top of the root where it joins the stem (e) in the stem itself For the following questions (21 to 30), please answer True or False. (0.5 marks each) 21. Mitochondria have their own DNA. 22. Lysosomes are important for packaging proteins for the cell membrane. 23. A tetrad is used to describe a pair of homologous chromosomes. 24. If both parents possess the genotype AaBb, they can produce nine different genotypes in the F 1 generation. 25. Both nerves and hormones regulate the secretion of enzymes. 26. Hemoglobin has a greater affinity for carbon monoxide that for oxygen. 27. Bacterial cells can divide by mitosis but not meiosis. 28. Archaea is a phylum of prokaryotes that live in extreme environments.

5 5 29. The growth and development of a plant is controlled by self-produced enzymes. 30. All plant tissues originate from one type of tissue called meristem. Communication 31. Explain the flow of energy between photosynthesis and respiration. (5 marks) 32. What are the advantages in plants that can reproduce both sexually and asexually? What are the disadvantages? (5 marks) 33. Compare and contrast the terms gene and allele? (4 marks)

6 6 34. Explain why DNA replication is a necessary step before mitosis or meiosis can occur? (3 marks) 35. Diffusion is not an effective mechanism for gas exchange in multicellular organisms. Explain why this statement is neither entirely true nor entirely false, using examples of different kinds of respiratory systems. (6 marks) 36. What roles do root hairs play for a plant? (2 marks)

7 7 Application 37. If you were planting a large garden to feed yourself and your family, which monocots and which dicots would you choose to plant? Give reasons fro your choice. (5 marks) 38. Bacteria and moulds do not grow in honey or pickle jars, even after their containers have been open. Explain why. (5 marks) 39. A scientist produces a new strain of seeds using genetic engineering What process, mitosis or meiosis, would the seed go through when germinating into a mature plant? Would the seed produced by the mature plant be identical or different from the original genetically engineered seeds? Explain. (5 marks)

8 8 40. When time-out is called during a fast-paced sporting event and the athletes stop to catch their breath, you often see them bending over and placing their hands on their knees. IS this a good position for recovery? Explain. (5 marks) 41. How do genetic mutations and sexual reproduction help produce diversity among living things? What other process leads to the evolution of new species? How are humans affecting these processes? Explain your answer. (5 marks) Problem solving For the questions below, please show ALL your work. 42. The taxonomic table shown here has four errors. Identify each error and write the correction. (8 marks) Taxon Example Organisms included in this taxon Kingdom Animalia Shark, horse, oyster, frog cougar, lynx, bobcat Phylum Chordata Horse, oyster, frog, cougar, lynx, bobcat Class Mammalia Horse, frog, cougar, lynx, bobcat Order Carnivora Frog, cougar, lynx, bobcat Family Felidae Cougar, lynx, bobcat Genus Lynx Lynx, cougar Species Lynx Canadensis lynx

9 9 43. Dinitrophenol (DNP_ is a chemical that interferes with the production of ATP in both chloroplasts and mitochondria. In an attempt to identify the minimal concentration of DNP required to inhibit ATP production, DNP was applied to separate suspensions of both organelles. Data are presented in the table. (6 marks) (a) Which set of data would represent the chloroplast? (b) Which organelle would be considered the most active? Explain. (c) Which organelle is most susceptible to changing concentrations of DNP? Explain. Concentration of DNP Organelle 5% 15% 25% 35% Volume of CO 2 released (ml) Volume of O 2 released (ml) N/a 44. Show what happens in a cross involving three independent traits at once. Find the ratios of the phenotypes in each case. Black fur (B) is dominant to brown fur (b) in hamsters. Short fur (a) is dominant to long fur (a). Rough coat (R) is dominant over smooth coat (r). (6 marks) (i) (ii) What happens when a hamster that is homozygous dominant for all three traits is crossed with a hamster that is homozygous recessive for all three traits? Use a Punnett square to determine your answer. Determine the genotypes and phenotypes of the offspring of a cross between two organisms from the F 1 generation...continue on next page

10 Complete the following table that compares mitosis and meiosis. (1 mark each = 5 marks total) Mitosis Meiosis Occurs in All body cells Number of cells produced per Two parent cell Number of chromosomes in Diploid (2n) parent cell Number of chromosomes in Same as parent cell daughter cells Type of cell produced Gametes Function Transfer of genetic information from generation to generation; increases variation