Willow trees (Salix species) are a well-known historical source of an active compound used to develop modern pain relief medication.
Name the active pain-relieving drug traditionally extracted from willow bark.
Table 1 shows information about the mass of this compound found in a healthy willow tree.
Table 1
| Part of willow tree | Mass of active compound in 100 g of plant tissue (g) |
|---|---|
| Bark | 2.8 |
| Leaves | 0.9 |
| Twigs | 1.4 |
A willow tree growing in drought conditions is stressed, limiting its synthesis of this compound. The mass of the compound found in the bark of this stressed tree is only 45% of the mass shown in Table 1.
Calculate the mass of the active compound in 150 g of this stressed bark. Give your answer in mg.
25 exam-style questions on AQA GCSE Biology 3.1 Communicable diseases, covering 3.1.1 Communicable (infectious) diseases, 3.1.2 Viral diseases, 3.1.3 Bacterial diseases, 3.1.4 Fungal diseases, 3.1.5 Protist diseases, 3.1.6 Human defence systems, 3.1.7 Vaccination, 3.1.8 Antibiotics and painkillers, and 3.1.9 Discovery and development of drugs. Each one has a worked solution and a mark scheme showing where the marks go.