Enzymes are protein molecules that act as biological catalysts to speed up chemical reactions in the human body.
The table below shows some information about different digestive enzymes.
Complete the table by giving the missing information for (i), (ii), (iii), and (iv).
| Type of enzyme | Example | Site of production | Optimum pH |
|---|---|---|---|
| protease | trypsin | (i) | 8.0 |
| (ii) | salivary amylase | salivary glands | (iii) |
| protease | pepsin | stomach | (iv) |
Explain why pepsin and trypsin have different optimum pH values.
65 exam-style questions on Edexcel IGCSE Biology Nutrition. Each one has a worked solution and a mark scheme showing where the marks go.