8. Human nutrition
A section of Biology, 5090
Listing 10 of 193 questions
Table 3.1 is a list of some of the constituents of a healthy human diet. Table 3.1 constituent carbohydrates fats proteins mineral salts fibre / roughage State one of these constituents that does not require digestion, is the body’s main storage substance. 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: constituent: 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.
5090_s16_qp_22
THEORY
2016
Paper 2, Variant 2
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Food supplements are substances that are often added to a person’s diet. These supplements may be in the form of a tablet. The diagram shows the label from a food supplement. To be taken with a balanced diet. Components: Amylase Cellulase Lipase Protease This supplement may be taken by a person whose pancreas is not producing enough of some of the components shown on the label. State the type of chemical that the supplement contains. Each food group in the diet is the substrate for a specific component of the supplement. Complete the table by writing the most appropriate word or words in each box. component of supplement substrate end product or products amylase protease lipase Cellulase is a component of the supplement that is not usually found in the human body. Use your knowledge of the structure of a plant cell to suggest the function of the cellulase component of the supplement. The supplement is taken in the form of a tablet that is swallowed. Each tablet is covered in a substance that breaks down only in alkaline conditions to release the components of the supplement. Suggest why this covering is important if the supplement is to work effectively in the alimentary canal.
5090_s19_qp_22
THEORY
2019
Paper 2, Variant 2
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shows a label from a snack bar. 70 g Nutrition Facts One bar: 70 g fat dietary fibre sugars protein vitamin C iron 11% 12% – 56% 0% 30% mass in g percentage of recommended daily value Explain how the nutrition provided by the snack bar is suitable for a person training for a sporting event. Calculate how many grams of dietary fibre are required in the diet to obtain 100% of the recommended daily value. g Describe what happens to protein in the digestive system.
5090_s23_qp_21
THEORY
2023
Paper 2, Variant 1
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Questions Discovered
193