A lab technician has two unlabelled liquid samples. One sample is suspected to contain starch, and the other is suspected to contain lipids.
Describe the chemical tests she should use to identify each substance.
Different groups of organisms have cell walls made of different substances.
Complete the table to show an example from each group of organisms and the main chemical component of their cell wall.
| Group | Example from the group | Main chemical component of cell wall |
|---|---|---|
| plants | [Box 1] | cellulose |
| fungi | Saccharomyces | [Box 2] |
| bacteria | [Box 3] | [Box 4] |
21 exam-style questions on Edexcel IGCSE Biology Biological molecules. Each one has a worked solution and a mark scheme showing where the marks go.