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Hahhahaha Essay

623 words - 2 pages

Unit B1, B1.1 Mark scheme
Keeping healthy
1. (i) the loop is sterilised 1 accept to kill anything on the loop
or to kill any bacteria on it; do not credit to clean the loop
(ii) if hot it would kill bacteria picked up (from culture); 1 accept 'microorganisms' or 'microbes' accept entry of contaminated air but reject entry of air unqualified
(iii) to prevent entry (from the air) of unwanted bacteria 1 or bacterial spores or fungal spores;
accept so can't breath on it; accept 'microorganisms' or 'microbes'
(iv) so that the (petri) dish is not opened (after bacteria are cultured) 1 or to reduce evaporation or drying of the agar,
accept 'microorganisms' or 'microbes' accept to prevent anything relevant getting in/out reject references to spillage
2. (a) being overweight 1 do not accept fat unqualified; allow BMI over 25
(b) (i) rose 1
by 8% / from 16% to 24% / by 50% / rapidly then more slowly 1
(ii) any two reasonable suggestions 2
e.g. less active accept e.g.s like fewer jobs / more cars / less physically demanding employment OWTTE
more food / take-aways / fast food
(c) (i) high (blood) cholesterol 1 do not accept combination of 2 labels ignore references to LDL and HDL
(ii) answer in range 8-17 inclusive 1
(iii) some deaths related to more than one factor 1 [8]
3. (a) any two from: 2 • age • gender • mass • number in group • time
(b) any two from: 2 • highest (mean) mass loss on Rosemary Conley or Rosemary
Conley most effective • least (mean) mass loss in control group or mean
Page 1 of 3

Unit B1, B1.1 Mark scheme
(c) (Atkins) 1 costs least mass loss very similar to other diets or second highest mass loss
or as effective as other diets
(d) any two from: 2 • (exercise) increases metabolic rate / respiration
ignore sweating • (exercise) needs / uses energy / calories
allow burns fat / calories do not accept energy for respiration
• (this) energy comes from food / fat...

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