O-LevelBiologyHuman Nutrition5090/22 · May/June 2016 · Q310 Marks
Table 3.1 is a list of some of the constituents of a healthy human diet. [Table 3.1 showing: constituent (carbohydrates, fats, proteins, mineral salts, fibre/roughage)]
- (a)State one of these constituents that
- (a)(i)does not require digestion,[1]
- (a)(ii)is the body's main storage substance.[1]
- (b)Name two dietary constituents that are missing from the list in Table 3.1 and for each state two reasons for its importance in the diet. constituent: 1 2 constituent: 1 2[6]
- (c)The chimpanzee is an animal whose metabolism is very similar to that of a human, but one type of chimpanzee lacks the gene responsible for the manufacture of amylase. Suggest how this will affect the diet of this type of chimpanzee.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2016). The mark or mark type is shown in brackets.
- [1] mineral salts/fibre/roughage;
- [1] fat/lipid ;
- [1] constituent: water;
- [max 2] reasons for importance: solvent/
- constituent of urine/
- reference to chemical reactions/
- constituent cells OR cyto-, proto-plasm OR blood/
- temperature regulator OR sweating/
- transporter/
- osmoregulator AW/
- prevents dehydration/
- lubrication/
- prevents constipation ;;
- [1] constituent: (named) vitamin ;
- [max 2] reasons for importance: prevent deficiency disease AW/
- reference to correct specified benefit of any vitamin ;;
- [max 2] little or no starch in diet/cannot digest starch AW;
- relies on sugar or named sugar AW;
- (needs to) eat fruit/animals/fewer plants;
- may rely on fat/protein (for energy);
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