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.

1. (a)(i)State the type of chemical that the supplement contains.[1]
2. (a)(ii)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 | |[3]
3. (a)(iii)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.[2]
4. (b)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.[3]

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