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O-LevelBiologyHuman Nutrition5090/21 · May/June 2023 · Q411 Marks

Fig. 4.1 shows a label from a snack bar. [Figure 4.1]

  1. (a)(i)Explain how the nutrition provided by the snack bar is suitable for a person training for a sporting event.[4]
  2. (a)(ii)Calculate how many grams of dietary fibre are required in the diet to obtain 100% of the recommended daily value.[2]
  3. (b)Describe what happens to protein in the digestive system.[5]

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Mark scheme

Marking points from the official mark scheme (May/June 2023). The mark or mark type is shown in brackets.

  1. [1] protein to build muscles ;
  2. [1] iron for haemoglobin / red blood cells ;
  3. [1] transport of oxygen ;
  4. [1] fats / sugars for energy ;
  5. [1] respiration ;
  6. [1] enhanced performance of muscles AW ;
  7. [2] 25 (g) ; ; 100 ÷ 12 = 1 mark (suitable working)
  8. [1] pepsin / protease ;
  9. [1] in stomach ;
  10. [1] trypsin ;
  11. [1] in duodenum / small intestine ;
  12. [1] breaks down / digests to peptides / amino acids ;
  13. [1] amino acids absorbed ;

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About this question

Topic
Human Nutrition, O-Level Biology (syllabus 5090). Structured question, 11 marks.
Source
O-Level Biology, May/June 2023 Paper 2 Variant 1, question 4.

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