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No commercial use is allowed.  \nIBO CHALLENGE II  \n32 nd INTERNATIONAL BIOLOGY OLYMPIAD Lisbon, PORTUGAL-July 21st, 2021  \nTHEORETICAL TEST  \n(Time available: 180 minutes)  \n▪ This test consists of 249 questions arranged in 54 Groups (Q1-Q54) .  \n▪ All questions have the same value – 1 point each correct answer.  \n▪ Maximum score: 249 points  \n▪ Only answers marked in the ANSWER SHEET will be validated  \nGENERAL INSTRUCTIONS  \n1. Your exam is composed of seven topics.  \n2. Your exam is composed of three types of questions:  \n● Multiple choice questions  \n● True / False questions  \n● Matching items questions  \n3. The students are not supposed to use words to answer the questions, only codes of letters placed in the appropriate locations in the answer sheet.  \n● Multiple choice questions should be answered by selecting the correct answer on the Answer Sheet  \n● True / false questions should be answered by selecting either a “T”for true or an “F” for false, on the Answer Sheet  \n● Matching items questions should be answered on the Answer Sheet by selecting the appropriate letter in the key provided in each case  \nENJOY AND HAVE FUN!!!  \nTHEORETICAL TEST  \nTopics:  \nI. Q1 - Q12 – Cell Biology  \nII. Q13- Q21 – Plant Anatomy and Physiology  \nIII. Q22- Q33 – Animal Anatomy and Physiology  \nIV. Q34- Q35 – Ethology  \nV. Q36- Q45 – Genetics and Evolution  \nVI. Q46- Q51 – Ecology  \nVII. Q52- Q54 – Biosystematics  \nI. Cell Biology  \nQ1  \nTo trace the path of a secretory protein from its synthesis to its export from a cell, suppose that you have added radioactive amino acids to a culture of cells, and then measured the amount of radioactivity that shows up in the proteins of each of the following cell fractions at different times after addition.  \nI – secretory vesicles II – Golgi complex III – rough ER  \nIV – nucleus  \nMark as true (T) or false (F) the order in which the proteins of these fractions exhibit radioactivity (4 points, 1 point each correct answer)  \nA. III  II  IV  I  out of the cell  \nB. III  II  I ~~ ~~ out of the cell  \nC. IV  III  II  I  out of the cell  \nD. IV  II  III  I  out of the cell  \nQ2  \nFor each of the following phases of the cell cycle, indicate whether the chromosome number is haploid (H), diploid (D) or could be either (E) . Also indicate whether chromosomes have replicate (R) or have not replicated (N/R) (Chromosome status) .  \n(10 points, 1 point each correct answer)  \n\n| Chromosome number | Chromosome status | Cell cycle phase |\n| --- | --- | --- |\n|  |  | G2 |\n|  |  | Meiotic metaphase I |\n|  |  | Mitotic prometaphase |\n|  |  | Meiotic interkinesis |\n|  |  | G1 |\n\nQ3  \nIndicate whether each of the following statements is true (T) or false (F) .  \n(4 points, 1 point each correct answer)  \nA. Centrosomes replicate independently of chromosomes.  \nB. The nuclear envelope becomes fragmented at mitosis, and it is distributed between the daughter cells like other membrane-bounded organelles such as ERand Golgi  \nC. The total DNA content of a cell following meiosis is half that of a cell after mitosis.  \nD. Microtubule polymerization, depolymerization, and microtubule motor proteins are required for DNA replication.  \nQ4  \nIndicate whether each of the following statements is true (T) or false (F) .  \n(4 points, 1 point each correct answer)  \nA. Plasmolysis occurs when a plant tissue is placed in a hypotonic medium.  \nB. Animal cells will lyse when they are placed in distilled water.  \nC. When plant cells are placed in a hyperosmotic sucrose solution, sugar crosses the cell wall but not the cell membrane, keeping the cell the same","cbCaie9pkydPt2VE","https://ap.wps.com/l/cbCaie9pkydPt2VE","pdf",19000505,71,"English","# THEORETICAL TEST\n## GENERAL INSTRUCTIONS\n## Topics\n### I. Q1 - Q12 – Cell Biology\n### II. Q13 - Q21 – Plant Anatomy and Physiology\n### III. Q22 - Q33 – Animal Anatomy and Physiology\n### IV. Q34 - Q35 – Ethology\n### V. Q36 - Q45 – Genetics and Evolution\n### VI. Q46 - Q51 – Ecology\n### VII. Q52 - Q54 – Biosystematics\n## Cell Biology (I)\n### Q1\n### Q2\n### Q3\n### Q4\n### Q5\n### Q6","[{\"question\":\"What is the time limit and total number of questions in the IBO CHALLENGE II theoretical test?\",\"answer\":\"Theoretical test time limit is 180 minutes and it consists of 249 questions arranged in 54 groups (Q1–Q54).\"},{\"question\":\"How are answers evaluated, and where must responses be marked?\",\"answer\":\"Only answers marked in the ANSWER SHEET will be validated. Questions are answered using codes of letters placed in the appropriate locations on the answer sheet.\"},{\"question\":\"How should students answer different question types?\",\"answer\":\"Multiple choice: select the correct answer on the answer sheet. True/false: select either “T” or “F” on the answer sheet. Matching items: select the appropriate letter in the key provided in each case.\"}]","IBO CHALLENGE II - Theoretical Test | PDF",1790422453,179]