Cells grown in a laboratory were supplied with different combinations of amino acids, fatty acids and glycerol. The amounts of protein and cell membrane made by the cells in one hour were measured.
The table shows the results.
| Molecules supplied to the cells | Protein made (relative units) | Cell membrane made (relative units) |
|---|---|---|
| Amino acids, fatty acids and glycerol | 82 | 64 |
| Fatty acids and glycerol only | 9 | 61 |
| Amino acids only | 80 | 7 |
Explain the results.
304 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.