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| Question | Answer |
| Affinity for oxygen | Haemoglobin (Hb) with a high affinity takes up oxygen easily and releases it less readily. Hb with a low affinity takes up oxygen less easily but releases it more rapidly |
| Associating | The process by which Hb combines with oxygen (in the lungs) |
| Dissociating | The process by which Hb releases oxygen (into the tissues) |
| Oxygen Dissociation curve | The s-shaped curve shown by how Hb binds oxygen (first molecule is hard to load, next three load easily |
| Starch | Storage molecule in plants, it is coiled, insoluble and can be hydrolysed to form α-glucose |
| Glycogen | Storage molecule in animals, which has short chains so it can be readily hydrolysed to α-glucose |
| Cellulose | Parallel chains of β-glucose joined by hydrogen bonds, forms myofibrils for strength |
| Chloroplasts | Organelle in plant cells containing grana, thylakoids and stroma. Photosynthesis occurs here. |
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