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Biology · 2014 · May · Paper 3 · SL · TZ1 · Markscheme

BiologyMarkscheme2014SLMay

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This markscheme is listed under Biology in the 2014 examination archive. Its catalogue level is SL. The catalogue session is May. 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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M14/4/BIOLO/SP3/ENG/TZ1/XX/M 13 pages MARKSCHEME May 2014 BIOLOGY Standard Level Paper 3 – 2 – M14/4/BIOLO/SP3/ENG/TZ1/XX/M Option A — Human nutrition and health 1. (a) highest 34, lowest 17; [1] (b) BMI above 30 is obese; more obesity/more values above 30 in 2003 than 1993; maximum value of 40/higher maximum in 2003 compared to 34 in 1993; greater range (of BMI values) / values above 30 in 2003; mode/peak/most common BMI value has increased from 21 in 1993 to 22 in 2003; mean BMI higher in 2003; [3 max] (c) change in eating habits/diet/junk food has led to more obesity; reduced levels of physical activity may lead to more obesity; population/migration/demographic changes (over 10 years); more underweight individuals because of eating disorders/anorexia; similar pattern in both sets of data so possibly no major changes in diet/lifestyle; larger sample size in 2003 may account for greater range of BMI Values; [3 max] 2. (a) minerals are elements in ionic form/are ions/are inorganic while vitamins are organic compounds [1] Do not accept vitamins are made in the body, minerals are not. (b) fish / named fish / fish oil; liver; eggs/egg yolk; dairy foods or example; foods/cereals with added vitamin D; [2 max] Do not accept action of sunlight. (c) should take enough to meet individual’s needs/RDA; need sufficient to prevent scurvy/promote tissue regeneration; higher intake (than minimum) may give protection against infections/boost immune system / OWTTE; excess vitamin C is excreted in the urine/cannot be stored; danger of rebound malnutrition / normal intake may not suffice after a period of excessive intake; [3 max]
File information
Subject
Biology
Document type
Markscheme
Year
2014
Session
May
Level
SL
Paper
3
Examination zone
TZ1
Language
Not labelled in the archive
File size
270 KB
Pages
13
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