Willow bark is a traditional source of a chemical used to develop a well-known painkiller.
Name the drug traditionally developed from the chemical extracted from willow bark.
Table 1 shows information about the mass of salicylic acid found in different tissues of a healthy willow tree.
Table 1
| Part of willow tree | Mass of salicylic acid in 100 g of tissue (g) |
|---|---|
| Outer bark | 2.4 |
| Inner bark | 3.2 |
| Twigs | 0.8 |
A drought-stressed willow tree has a physiological condition that limits its chemical production. The mass of salicylic acid found in the inner bark of this stressed tree is only 35% of the mass shown in Table 1.
Calculate the mass of salicylic acid in 250 g of this drought-stressed inner 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.