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M14/4/BIOLO/HPM/ENG/TZ1/XX 22146007 BIOLOGY HIGHER LEVEL PAPER 1 Friday 9 May 2014 (afternoon) 1 hour INSTRUCTIONS TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question, choose the answer you consider to be the best and indicate your choice on the answer sheet provided. • The maximum mark for this examination paper is [40 marks]. 2214-6007 15 pages © International Baccalaureate Organization 2014 –2– 1. M14/4/BIOLO/HPM/ENG/TZ1/XX Results from a scientific study produced a graph with this appearance. Y X What can be concluded about the study? A. The standard deviation of X is high B. 68 % of the population has the mean value for X C. The graph suggests that Y causes X D. There is little variation in X 2. Though a single nerve cell does not think, millions of them organized as a brain result in thinking. What kind of property does thinking represent? A. Anatomical B. Adaptive C. Extracellular D. Emergent 3. Why are stem cells useful in repairing diseased or damaged organs? A. They are specialized B. They reproduce C. Unlimited quantities are available from adult tissue D. They can be transferred between species 2214-6007 –3– 4. Which structures have a phospholipid bilayer? I. II. vesicle nucleus M14/4/BIOLO/HPM/ENG/TZ1/XX III. nucleoid A. I and II only B. I and III only C. II and III only D. I, II, and III 5. Which usually takes the most time in the cell cycle? A. Cytokinesis B. Interphase C. Telophase D. Anaphase 6. Which is a disaccharide? A. Fructose B. Galactose C. Lactose D. Ribose 2214-6007 Turn over –4– 7. M14/4/BIOLO/HPM/ENG/TZ1/XX How much energy is stored in 1 kg of body fat compared to 1 kg of glycogen? A. Half as

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