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Biology · 2010 · November · Paper 3 · SL · Question paper

BiologyQuestion paper2010SLNovember

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This question paper is listed under Biology in the 2010 examination archive. Its catalogue level is SL. The catalogue session is November. The information below helps you identify the document before opening the complete PDF. Subject, year and session labels come from the archive catalogue; the original cover remains the reference if a label differs. A file is not automatically suitable for your current syllabus simply because its subject name matches.

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8810-6006 28 pages N10/4/BIOLO/SP3/ENG/TZ0/XX Wednesday 3 November 2010 (morning) Biology STANDARD level PAP eR 3 INSTRUCTIONS TO CANDIDATES • Write your session number in the boxes above. • Do not open this examination paper until instructed to do so. • Answer all of the questions from two of the Options in the spaces provided. You may continue your answers on answer sheets. Write your session number on each answer sheet, and attach them to this examination paper and your cover sheet using the tag provided. • At the end of the examination, indicate the letters of the Options answered in the candidate box on your cover sheet and indicate the number of answer sheets used in the appropriate box on your cover sheet. 1 hour [Personal identifier removed] © International Baccalaureate Organization 2010 0 1 2 8 8 8 1 0 6 0 0 6 8810-6006 – 2 – N10/4/BIOLO/SP3/ENG/TZ0/XX Option A — Human nutrition and health A1. Rickets, caused by a defective vitamin D receptor (VDR), can be prevented by high calcium intake. A series of experiments were performed to test this. The results are shown in the graphs. Graph A shows the change in blood calcium levels after calcium administration in normal mice with and without addition of vitamin D. It also shows the change in blood calcium levels in mutant mice, which lack the vitamin D receptor. Graph B shows the change in blood calcium levels after calcium administration in normal mice after being subjected to one week of low, medium and high calcium diets. Graph A Change in blood calcium levels / µmol 2.5 2.0 1.5 1.0 0.5 0 Key: normal mice + calcium + vitamin D normal mice + calcium only mutant mice + calcium only 0 2 4 6 8 10 Time since calcium administration / min Graph B Change in blood calcium levels / µmol 2.5 2.0 1.5 1.0 0.5 0 Key: normal mice + low calcium diet normal mice + medium calcium diet normal mice + high calcium diet 0 2 4 6 8 10 Time since calcium administration / min [S. J. V an Cromphaut, M. Dewerchin, J. G. J. Hoenderop, I. Stockmans, E. V an Herck, S. Kato, R. J. M. Bindels, D. Collen, P . Carmeliet, R. Bouillon et al. (2001) “Duodenal calcium absorption in vitamin D receptor-knockout mice: Functional
File information
Subject
Biology
Document type
Question paper
Year
2010
Session
November
Level
SL
Paper
3
Examination zone
Not labelled in the archive
Language
Not labelled in the archive
File size
1.5 MB
Pages
28
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